Animal Shelter Directory USA
Helping Shelters · 4 min read

How to Foster a Pet

How fostering works, who pays for what, the types of foster placements and what to expect when your foster pet is adopted.

Updated October 7, 2026 · Reviewed by the Animal Shelter Directory USA editors

Fostering a pet means caring for a shelter or rescue animal in your home temporarily, until it is adopted or ready to return to the shelter. To foster, apply with a local shelter or rescue, complete a short orientation, and take home an animal that matches your space and experience. In most programs, the organization pays for vet care and often provides food and supplies, while you provide time, a safe space and care.

Foster homes help shelters save more lives by freeing kennel space and giving animals a calmer place to recover and learn. This guide covers how fostering works, the types of placements, and what to expect.

Why fostering matters

  • Frees space. Every animal in a foster home is a kennel open for another animal.
  • Reduces stress. Many animals do better in a home than in a loud shelter.
  • Helps adoptions. Fosters can describe how an animal behaves in a home, which helps find a good match.
  • Supports vulnerable animals. Young kittens, puppies, sick or injured animals and seniors often need home care that a shelter cannot provide.

Many foster-based animal rescues have no building at all and depend entirely on foster homes.

Types of foster placements

TypeTypical lengthWhat it involves
Bottle baby kittensA few weeksFeeding every few hours, keeping them warm; demanding but critical
Weaned kittens or puppiesA few weeks until old enough for surgerySocialization, feeding, cleaning
Mom and litterSeveral weeksSupporting the mother while she cares for her young
Medical recoveryDays to weeksMedication, rest after surgery or illness
Behavior fosterWeeks to monthsBuilding confidence in shy or fearful animals
Senior or hospice fosterWeeks to the rest of the animal's lifeComfort care; see adopting a senior pet
Short-term or weekend fosterOne night to a few days"Field trips" or breaks from the shelter
Long-term fosterUntil adoptionMost common at foster-based rescues

Who pays for what

Policies vary, but typically:

  • The organization pays for vet care, vaccines, spay or neuter and medication, usually at its own clinic or partner vets.
  • Supplies such as crates, food, litter, bowls and toys are often provided or reimbursed.
  • You provide your time, transport to vet visits and adoption events, and a safe space.

Ask about this before you start, including what happens in a medical emergency after hours. Foster expenses for a 501(c)(3) organization may be tax deductible in some cases; ask a tax professional.

Who can foster

Foster programs generally look for:

  • Adults (often 18 or 21 and older)
  • Landlord approval if you rent
  • Current pets that are vaccinated and spayed or neutered
  • A space to keep the foster separate at first, such as a spare room or bathroom
  • Reliable transport to vet appointments

You do not need a big house or prior experience for many placements. Shelters match fosters to animals that suit their homes.

How to start fostering

  1. Find a program. Contact local humane societies, no-kill shelters, dog rescues or cat rescues. Use the near me page.
  2. Apply. Expect questions about your home, schedule and current pets.
  3. Attend orientation. Learn the organization's rules, medical protocols and how to reach staff.
  4. Prepare a space. A quiet room with easy-to-clean floors works well.
  5. Pick up your foster. You will receive any medications, food and instructions.

Living with a foster pet

  • Keep fosters separate at first from your own pets, both for disease prevention and to allow a slow introduction.
  • Follow the medical plan and report any symptoms promptly.
  • Take photos and write notes. Good photos and honest descriptions help with adoption.
  • Help with adoptions if your program asks you to meet potential adopters or attend events.
  • Keep the animal safe. Use a leash or carrier outside; new animals can bolt.

Saying goodbye

Many people worry that letting go will be too hard. It is normal to feel sad when a foster is adopted, and many fosters say it gets easier knowing each goodbye makes room for another animal. If you fall in love, most programs allow "foster fails," meaning you adopt the animal yourself.

Is fostering right for you?

Fostering suits people who want to help but cannot commit to a pet for many years, people who want to see whether a pet fits their life, and people who enjoy variety. It may be harder if you travel often or have pets that do not tolerate newcomers. Short-term or weekend fostering is a good way to try.

For other ways to help, see how to help a shelter and how to volunteer at an animal shelter.

Frequently asked questions

How long do you foster a pet?

It ranges from a single night to several months. Kittens and puppies are usually fostered until they are old and heavy enough for spay or neuter surgery, often several weeks. Adult animals at rescues stay until adopted.

Does it cost money to foster a pet?

Usually little. Most shelters and rescues pay for vet care and many provide food and supplies. You cover your own time and transport. Ask your program what it covers.

Can I foster if I have other pets?

Often yes, as long as your pets are vaccinated, healthy and comfortable with other animals. You may be asked to keep the foster separate at first.

Can I adopt my foster pet?

In most programs, yes. Fosters often get first choice to adopt. Tell your coordinator as early as possible.