Adopting a Senior Dog: What to Ask, What It Costs and Your First 30 Days

Adopting a senior dog goes best with a health plan and a calm start. Ask the shelter for all medical records, and bring them to the first vet exam, as VCA advises. After that, plan for vet visits twice a year or more, per the AVMA. During the first 48 hours, keep close to your dog and follow a consistent routine. The ASPCA says early accidents and restlessness should ease after several days.

Key points

• Before you sign, ask for vaccination and deworming records, heartworm and tick prevention history, and details of any known medical concerns.
• Try not to leave your new dog home alone for the first 48 hours, and keep meals, walks, and play at similar times each day.
• Switch foods gradually over at least a week: 90% old food on day 1, half and half on days 3 and 4, and all new food on day 7.
• Budget for a blood count, chemistry panel, and urinalysis every 6 to 12 months, as AAHA's 2023 senior guidelines recommend.
• Pet insurance may not cover pre-existing conditions, and premiums typically increase as a pet ages.
  

Adopting a senior dog: the benefits and the trade-offs

Adopting a senior dog lets you see its adult size and temperament before you commit. The trade-offs include more vet care, possible existing health problems, and fewer years together. Plan for both sides before you sign. Once your dog is home, the senior care plan covers caring for an older dog day to day.

A dog is considered senior once it reaches about 75% of its average lifespan, say VCA Animal Hospitals. That means 5 or 6 years for giant breeds such as Great Danes, and 10 to 12 years for small breeds.

Is it a good idea to adopt an older dog?

It can be a good fit if you plan for an older dog's care needs. With an adult dog, there are fewer surprises: its full-grown size is known, and shelter staff can describe its energy level and personality. You can choose a dog whose pace matches your household.

Senior dogs are often overlooked at shelters, yet they can make wonderful pets, says a veterinary technician with the Dog Aging Project at Texas A&M's College of Veterinary Medicine. The benefits she describes:

What are the downsides of adopting an older dog?

The main trade-offs are more vet care, existing health problems, and less time together. Senior pets need vet visits twice a year or more, according to the AVMA, and these exams are more thorough. VCA's overview of pet insurance notes that a policy may not cover previously diagnosed, or pre-existing, conditions. Since a senior dog is already in the later stage of life, you will likely share fewer years than with a young dog.

Questions to ask the shelter before you adopt

Ask the shelter for the dog's full medical records, current medications and food, and how it handles stairs, other animals, children, and house-training. These answers help you prepare for the first vet visit and the first week at home.

What should I know before I adopt an older dog?

Start with the dog's health history. VCA's advice on a dog's first vet visit lists the records to collect: vaccinations, deworming, heartworm and tick prevention, and any known medical concerns. Ask for the exact food, portion size, and feeding times, too, so you can keep them consistent at first. Tufts' Petfoodology team advises changing foods over at least one week.

Print this checklist and take it to the shelter.

Ask about	What to find out
Medical records	Vaccinations, deworming, heartworm and tick prevention, and known medical concerns (VCA)
Medicines	Each current medicine and its dose, exactly as the vet wrote them
Food	The exact food, the amount and the feeding times, so a later switch can be slow (Tufts)
Mobility	How the dog does with stairs, slick floors and getting into a car
House-training	Whether the dog is house-trained, and its usual toilet times
Behavior	How the dog does with other dogs, cats, children and strangers
History	Why the dog came to the shelter
Adoption fee	What the fee covers, for example an exam, vaccines or a microchip

If you volunteer with or run a rescue, read about HolistaPet's program for rescues and shelters.

How to budget for an older dog's vet care

Budget for at least two vet exams a year, routine blood, urine, and parasite tests, dental care your vet recommends, and pet insurance if you choose it. Prices vary by clinic, so ask your clinic for a quote for each item in the table below.

How much does it cost to care for a senior dog?

The cost depends on your clinic's prices and your dog's health, so build your budget item by item rather than relying on a national average. Senior pets need vet visits twice a year or more, says the AVMA.

AAHA's 2023 senior care guidelines also recommend:

• A complete blood count, chemistry panel, and urinalysis every 6 to 12 months
• A thyroid (T4) test and a blood pressure check every year
• Heartworm and tick-borne disease tests every year
• Fecal parasite tests 1 to 4 times a year

Include dental care in your budget, too. Senior dental care can include brushing, water additives, and dental cleaning with a full oral assessment under anesthesia, according to VCA.

Ask your clinic to price each item. The intervals come from the AVMA, AAHA, and VCA pages cited in the table below.

Item	How often	Source
Wellness exam	Twice a year or more	AVMA
Complete blood count, chemistry panel and urinalysis	Every 6 to 12 months	AAHA
Thyroid (T4) test and blood pressure check	Every year	AAHA
Heartworm and tick-borne disease tests	Every year	AAHA
Fecal parasite test	1 to 4 times a year	AAHA
Dental cleaning under anesthesia	As your vet advises	VCA
Pet insurance premium, if you buy a policy	As your policy bills it	VCA

What pet insurance may not cover for an older dog

Read the policy's limits before relying on it. VCA's overview of pet insurance notes these points:

• A policy may not cover previously diagnosed (pre-existing) conditions.
• Premiums typically rise as a pet ages because older pets have higher medical costs.
• Many policies have extended waiting periods for certain conditions.
• Some policies cover preventive care, such as dental cleanings, for an added fee.

Budget for the unexpected, too. Each year, one in three dogs and cats needs a vet visit for an illness or accident, VCA adds.

Get your home ready before your senior dog arrives

Before day one, buy the basic supplies, set up a quiet, safe space, put away anything you do not want chewed, and cover slick floors. Check that the dog's microchip information and ID tag show your current address.

What do I need before bringing home a senior dog?

You need the same basics as any new dog, plus a few extras for an older dog's needs. The ASPCA's supplies list for newly adopted dogs covers the basics.

Every new dog

• Water and food bowls
• A crate and a dog bed
• Food toys or puzzles, chews, treats, and a treat pouch
• Toys
• A flat collar and a harness fitted to the dog
• A 6-foot non-retractable leash and a long line for recall practice
• ID tags, kept current
• A pet gate
• Enzymatic cleaner and poop bags

Extra for an older dog

• Washable runners or rugs for slick floors. VCA lists avoiding slippery floors as a sign of pain in older dogs.
• A bed on the main floor that is easy to step onto.
• A pet gate across the stairs to prevent your dog from using them unsupervised.

Set up a safe space

Give your dog a safe space from the first hour: a covered crate with comfortable bedding or a bed in a quiet, low-traffic area, as the ASPCA's tips for a new dog suggest. Put away anything you do not want chewed, and offer chews and puzzle toys instead.

Make sure your dog is microchipped and wears an ID tag with your current address. This advice comes from Cornell's advice for dogs moving to a new home and applies to newly adopted dogs, too. For a room-by-room comfort checklist, see the senior care plan linked at the top of this article.

The first 48 hours with your new senior dog

During the first 48 hours, keep close to your dog, keep the house quiet, and follow a simple, consistent routine. The ASPCA advises trying not to leave a new dog home alone during this time.

• Keep your dog in its quiet room with familiar items from the shelter, such as a blanket. Cornell's moving advice suggests keeping familiar bedding, toys, and blankets.
• Give frequent opportunities for bathroom breaks outside, and reward success with a treat.
• Offer meals, walks, and play at similar times each day.
• Wait until you have built a bond before inviting family and friends to visit.
• If you have another dog, keep the dogs apart at mealtimes, and supervise them when they are together.

Expect a few bumps at first. House-training accidents, trouble settling, eating less, and separation anxiety are common initially. They should ease after several days of a consistent routine, the ASPCA says.

Do not punish accidents. The ASPCA's advice on older dogs warns that punishment can increase a dog's anxiety. Clean up with an enzymatic cleaner, and take your dog outside more often.

The first vet visit: what to bring and what to ask for

Book a vet exam soon after adoption, and bring the shelter's records and a stool sample. Leave with a plan for baseline tests, vaccines, parasite prevention, and dental care.

When should I take my adopted senior dog to the vet?

Take your adopted senior dog to the vet soon after adoption. Make it a priority if your dog has a known condition, takes medication, or seems unwell. After the first exam, plan for wellness visits twice a year, as VCA advises. The AVMA says senior pets need a vet visit twice a year or more.

What happens at the first exam?

According to VCA, the vet checks your dog's coat, eyes, ears, teeth and gums, heart and lungs, belly, and walking movements. Tests include a stool check for intestinal parasites and a blood test for heartworm and tick-borne diseases. The vet then provides any vaccines and parasite prevention your dog needs.

Take this list to the appointment:

Bring

• All medical records from the shelter
• A stool sample, if you can collect one
• A list of your dog's current food and any medications
• Short phone videos of anything unusual you have noticed at home
  

Ask

• Which baseline senior tests are appropriate for my dog now: a complete blood count, chemistry panel, urinalysis, thyroid (T4) test, and blood pressure check? All five are included in AAHA's 2023 senior care guidelines.
• Which vaccines does my dog need? VCA's senior care advice recommends discussing vaccinations with your vet.
• Which parasite preventives does my dog need?
• Do my dog's teeth need care? Senior dental care can include a cleaning with a full oral assessment under anesthesia.
• What is a healthy target weight for my dog?

Food for an adopted senior dog: keep the shelter's diet, then switch slowly

Keep feeding the shelter's food at first. If you change it, introduce the new food gradually over at least a week. Choose any new food with your vet, based on a health reason.

Should I change my adopted dog's food?

Only for a reason, and only gradually. There is no legal definition of senior pet food. Turning 7 or 10 does not by itself mean a dog needs to switch foods, says Tufts' Petfoodology team. Make dietary changes for a health reason, with your veterinarian's guidance.

If you and your vet decide to switch, mix increasing amounts of the new food into the old over at least one week. Follow the schedule from Tufts' board-certified veterinary nutritionist.

Day	Old food	New food
Day 1	90%	10%
Day 2	75%	25%
Days 3 and 4	50%	50%
Day 5	25%	75%
Day 6	10%	90%
Day 7	None	All

If mild stomach upset develops, continue the transition but spread it over more days. Call your vet if vomiting continues, your dog has liquid diarrhea, or your dog seems to be in pain or unusually tired.

Watch weight and appetite in the first weeks

Weigh your dog in the first week to establish a baseline, then use the same scale at least every two months, as VCA advises. Eating less is common in the first days, notes the ASPCA. VCA lists weight loss and a significant decrease in appetite as reasons to have a senior dog checked. See your vet if appetite or weight continues to drop, and read about what to offer an older dog that keeps refusing food.

How long does a senior dog take to adjust to a new home?

Early signs of unease, such as accidents, restlessness, and eating less, should fade after several days of routine, according to the ASPCA. The time needed to settle in fully varies from dog to dog, so judge progress week by week rather than by a fixed date.

Build alone time gradually. Cornell's advice for dogs moving to a new home recommends leaving your dog alone for very short periods each day, then slowly increasing the time. If your dog panics when you leave, talk to your vet and read about easing separation anxiety.

Watch your dog's body language as it settles in. This overview of the signs of stress in dogs explains what to look for. New behavior problems in an older dog can include waking at night, vocalizing, bathroom accidents, or anxiety. These may stem from medical problems, including arthritis, dental disease, hypothyroidism, and loss of sight or hearing, that your vet should rule out, says the ASPCA. Book a vet check rather than waiting for them to pass.

Your first 30 days, step by step

This timeline brings the first month's steps together and includes a source for each one.

When	What to do	Source
Before day 1	Buy the basic supplies.	ASPCA supplies list
Before day 1	Set up a quiet safe space, and check the microchip and ID tag.	ASPCA; Cornell
Before day 1	Book the first vet visit, and ask the clinic how soon it wants to see your dog.	Your clinic
Days 1 and 2	Stay close, keep your dog in the quiet room with familiar items, and offer frequent toilet trips.	ASPCA; Cornell
Days 3 to 7	Keep meals, walks and play at the same times each day.	ASPCA
Days 3 to 7	Start a slow food switch, only if you and your vet want one.	Tufts food-switch schedule
Days 3 to 7	Weigh your dog to set a baseline.	VCA senior care
First vet visit	Bring the shelter's records and a stool sample.	VCA first-visit advice
First vet visit	Ask which baseline senior tests fit your dog.	AAHA guidelines
Weeks 2 to 4	Make short absences slowly longer.	Cornell moving advice
Weeks 2 to 4	Add easy sniff walks and food puzzles.	Cornell senior enrichment

A daily routine for the first month, and where supplements fit

After the first week, build a daily routine of gentle walks, brain games, and rest at set times. Cornell's senior enrichment advice suggests walking at cooler times of day on easy paths, with plenty of time for sniffing. It also recommends food puzzles and scent games indoors. Senior dogs can still learn new tricks, so a short lesson can be part of the day.

 

Do not overdo it. A dog eager to please may push past its limits. Watch for signs your dog has had enough, and end the walk early.

After your vet has examined your dog, ask whether a daily supplement fits its routine. If you and your vet decide to add one, browse HolistaPet's supplements for senior dogs. HolistaPet makes the supplements in this collection for use as one part of a daily wellness routine, together with regular vet care.

Sources

1. VCA Animal Hospitals (Krista Williams, DVM; Tammy Hunter, DVM; Lynn Buzhardt, DVM). Preparing for Your Dog's First Veterinary Visit. 2025.
2. American Veterinary Medical Association (AVMA). Caring for senior cats and dogs. Undated.
3. ASPCA. Tips for a New Dog. Undated.
4. VCA Animal Hospitals (Malcolm Weir, DVM; Krista Williams, DVM; Ernest Ward, DVM). Senior Dog Care: Special Considerations. 2026.
5. Texas A&M College of Veterinary Medicine & Biomedical Sciences, Pet Talk (quoting Harmony Peraza, Dog Aging Project). Teaching An Old Dog New Tricks: Adopting Senior Dogs. 2022.
6. VCA Animal Hospitals (Courtney Barnes, DVM; David Goodnight, DVM). What is Pet Insurance? 2026.
7. Tufts University Cummings School of Veterinary Medicine, Petfoodology (Deborah E. Linder, DVM, MS, DACVIM (Nutrition)). How do I switch my pet's food? 2019.
8. American Animal Hospital Association (AAHA). 2023 AAHA Senior Care Guidelines for Dogs and Cats: Diagnostic Tests and Recommended Frequencies for Senior Dogs and Cats (Table 1). 2023.
9. ASPCA. Supplies List for Newly Adopted Dogs. Undated.
10. VCA Animal Hospitals (Courtney Barnes, DVM; Ryan Llera, DVM; Krista Williams, DVM; Robin Downing, DVM, DAAPM). How to Recognize Pain in Aging Dogs. 2026.
11. Cornell University College of Veterinary Medicine, Riney Canine Health Center. Moving to a new home with your dog. Undated.
12. ASPCA. Behavior Problems in Older Dogs. Undated.
13. Tufts University Cummings School of Veterinary Medicine, Clinical Nutrition Service (Petfoodology). When should I switch my pet to a senior diet? 2016.
14. Cornell University College of Veterinary Medicine, Riney Canine Health Center. Senior dog enrichment. Undated.