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Published on July 6th, 2022
Updated on June 18th, 2026
Learn about pet fostering. Becoming a foster pet parent can provide some wonderful animals with a temporary loving home.
When shelters are over capacity, they often look for temporary families to help care for pets. Below, you’ll find answers to common questions about pet fostering. With so many wonderful animals in need of a loving home we’re so glad you’ve taken an interest in finding out more about this truly admirable deed.
When you foster a pet, you provide a short-term home for an animal that needs love and care until they’re adopted. Under your care, you’re enabling the pet to blossom so that prospective families will see his true personality. Plus, you’re removing many of the stresses that cause animals to “show” poorly in a shelter environment, such as constant barking, continuous introductions to strange people, and not being walked or played with on a regular basis. Best of all, by opening your heart and home, you are actually saving the lives of two animals: the one you are fostering and the one you’ve made room for at the shelter.
Simply put, many shelters have too many animals. In many cities, pets that find themselves in shelters only have days to find a new home. Fostering saves the lives of these pets, giving them the time they need to get adopted.
Additionally, government animal care organizations, SPCAs, humane societies and foster-based rescues also need foster homes for animals that are not ready for adoption for any of the following reasons:
Here are just a few of the many benefits:
The answer to this question can depend on the situation and the animal. For puppies and kittens, you may be asked to help get them to an adoptable age, which can be up to 12 to 16 weeks old. Adult cats and dogs that are recovering from an illness or injury may need additional rehabilitation time before they can attend an adoption event. In other cases, your foster’s stay could be short if you regularly attend weekend adoption events and actively participate in sharing the pet’s picture and details on social media and on flyers posted on community billboards.
There are some basic requirements:
You will need to provide healthy food, treats, toys and possibly a crate for your foster pet. We recommend natural nutrition for optimum health benefits. Your veterinarian or Petco store partners can help you choose the best products for the complete care of your foster pet.
Depending on the animal rescue and the pet, you might need to initially keep your own animals separate from your foster animals. This will prevent any possible spread of illness and gives your new foster animal time to settle in. You are encouraged to eventually allow the animals to interact while under supervision.
It’s understandable that a foster pet might steal your heart. If you’re interested in adopting your foster pet, make sure to tell your foster coordinator as soon as possible.
Once you have decided that you would like to be a foster parent, get in touch with a local animal rescue. Depending on the organization, you might need to fulfill certain requirements. Foster organizations can help you find an animal that is the best fit for you.
What do I need to foster a pet? At minimum, you'll need dedicated space in your home, time to attend adoption events or promote your foster pet on social media, basic supplies (wholesome food, treats, toys and possibly a crate), and compassion for an animal that may need extra TLC. Some shelters supply prescription medicines and food — confirm with your organization what's covered before your foster animal arrives.
How much time does fostering actually take each week? It depends on the animal's needs. Neonatal kittens or puppies requiring bottle-feeding demand round-the-clock attention, while a healthy adult dog recovering from a minor injury may need only routine daily care plus occasional weekend adoption events. Plan for a meaningful daily time commitment regardless of the animal's age or health status.
What if I already have pets at home? You can still foster. Most rescue organizations recommend keeping your resident pets and the foster animal separated at first to prevent the spread of illness and to let the newcomer settle in. Once both parties seem comfortable, supervised introductions can begin gradually. Always consult your veterinarian if your resident pet shows any signs of stress or illness during the transition.
What if I fall in love and can't let go? It happens — and it's completely understandable. If you want to adopt your foster pet, let your foster coordinator know as soon as possible. Acting quickly gives the organization time to adjust their placement plans and keeps the process smooth for everyone involved.
How long will a foster pet stay with me? Foster stays vary widely. Young puppies and kittens may stay until they reach adoptable age — typically 12 to 16 weeks old. Adults recovering from illness or injury may need additional rehabilitation time. Actively sharing your foster pet's photos and story on social media and attending weekend adoption events can significantly shorten the stay.
Are my fostering expenses tax-deductible? Unreimbursed out-of-pocket costs incurred while fostering for a qualifying nonprofit rescue or shelter may be tax-deductible as a charitable contribution under U.S. tax law. Always consult a qualified tax professional for advice specific to your situation.
Use this quick-reference table to understand how fostering compares to adoption, and what level of commitment different foster animals typically require. Every situation is unique, so always confirm details with your local rescue or shelter.
| Factor | Fostering | Adopting |
|---|---|---|
| Length of commitment | Temporary — days to several months | Permanent — the lifetime of the pet |
| Financial responsibility | Shared with the rescue (medical costs often covered) | Fully yours |
| Supplies (food, toys, bedding) | Varies by organization — confirm before you start | Fully yours from day one |
| Emotional outcome | Rewarding; "foster fails" (adopting your foster) are welcome | Deep, lasting bond |
| Flexibility | High — you can pause between placements | Low — a lifelong commitment |
| Impact on shelter capacity | Frees a kennel space, saving two lives at once | Removes one animal from the shelter |
| Best for | Pet parents exploring pet life, families with changing schedules | Pet parents ready for a permanent companion |
| Animal Type | Usual Foster Duration | Common Reason for Foster Care | Key Care Consideration |
|---|---|---|---|
| Neonatal kittens or puppies | 4–12 weeks | Too young to be altered or adopted | Bottle-feeding every 2–4 hours; strict warmth and hygiene |
| Kittens / puppies (weaned) | 4–8 weeks | Reaching adoptable age (12–16 weeks) | Socialization, basic cue introduction, core vaccines coordinated with rescue |
| Adult dogs | 2–8 weeks (varies) | Recovery from illness, injury or behavioral support | May need crate rest, medication management or structured routine |
| Adult cats | 2–6 weeks (varies) | Shelter stress, illness recovery or socialization | Dedicated quiet space away from resident pets during acclimation |
| Small pets (rabbits, guinea pigs, etc.) | 1–4 weeks | Overcrowding or post-treatment recovery | Species-appropriate nutrition and habitat enrichment |
| Nursing mothers | Until kittens/puppies are weaned and old enough to be altered | Keeping litters intact and reducing shelter stress | High-calorie nutrition; consult your veterinarian on dietary needs |
Quick tip: Foster duration can shrink significantly when you attend weekend adoption events and actively share your foster pet's photos and story on social media — so your effort outside the home matters just as much as the care inside it.
What is the difference between fostering and adopting a pet? Fostering means providing a temporary home until a pet is adopted by a permanent family, while adoption is a lifelong commitment. Fostering is fully supported by the rescue organization — medical costs are often covered — whereas adoption places full financial and care responsibility on the pet parent.
Do I need to pay for my foster pet's food and veterinary care? It depends on the organization. Many rescues supply prescription medications and cover veterinary visits, but some ask foster families to provide food, toys and bedding. Always clarify what the rescue covers before you bring a foster pet home. For guidance on appropriate nutrition for foster animals in your care, your veterinarian or a knowledgeable Petco associate can help you choose a wholesome option.
Can I foster a pet if I already have animals at home? Yes, in most cases — but plan for a careful introduction period. Keep your foster pet separate from resident animals at first to prevent the spread of illness and to let the newcomer settle in. Gradual, supervised interactions are encouraged once both animals appear calm and comfortable.
How do I know if a foster pet is healthy enough to be around my family? Your rescue or shelter will share the pet's known health history and vaccination records. If you have concerns about illness, injury or behavior, contact your veterinarian promptly. Never attempt to diagnose or treat a medical condition yourself — your foster coordinator and your vet are your best resources.
What happens if I want to adopt the pet I'm fostering? This is warmly known in the rescue community as a "foster fail" — and it's actually a success story. If your foster pet has stolen your heart, let your foster coordinator know as soon as possible so the organization can update the pet's status and begin the formal adoption process.
Are fostering expenses tax-deductible? Unreimbursed out-of-pocket costs incurred while fostering for a qualified nonprofit rescue organization may be tax-deductible as a charitable contribution. Tax rules vary by situation, so consult a qualified tax professional for advice specific to your circumstances.
This article was created with assistance from AI tools and reviewed for accuracy by Petco's content team.