At a glance
- Species limits in federal law
- None listed for ESAs
- Training required
- None for an ESA
- Federal housing status
- Untrained ESAs reviewed case by case
- Letter price
- $129 for up to 2 animals, $199 for 3+
Which animals can be ESAs
Federal housing law does not list approved species for emotional support animals. What matters is whether a licensed therapist finds that the animal's companionship helps with a disability-related need, and whether keeping that animal is reasonable in your home.
Simply being comforting isn't a trained task, which is why an ESA falls outside the ADA's service animal category and can't come into stores, restaurants or offices by right. If your dog has been taught specific tasks that help with a psychiatric disability, it may actually be a psychiatric service dog.
Choosing an ESA that fits your life
The AVMA encourages anyone choosing a pet to think about cost, time, backup care, lifespan and housing rules before committing. Some birds can live for decades, many reptiles live into their teens, and dogs need daily exercise. The best emotional support animal is one whose needs you can meet on hard days as well as good ones.
Research on animals and mental health is still developing, and NIH describes the findings as mixed. An ESA can add comfort and routine, but it works alongside treatment rather than replacing it.
Emotional support animal guides by species
Each guide covers suitability, daily care and costs, health precautions, 2026 housing considerations and how to be a good neighbor.
- Dogs: the most familiar ESA, with the most exercise and training needs, and a special 30-day rule for dog letters in California
- Cats: quiet, apartment-friendly companions, with litter box and toxoplasmosis tips
- Rabbits: gentle and litter-trainable, but long-lived and fond of chewing
- Birds: social and interactive, with long lifespans and noise to consider
- Small pets: guinea pigs, rats, hamsters, gerbils and mice compared
- Reptiles and exotics: special care, Salmonella precautions and closer housing scrutiny
- Multiple ESAs: how each animal must relate to your need, and letter pricing
- Breed and size limits: how weight caps, breed lists, direct threat and insurance interact with requests
Animal health basics for every ESA
The CDC notes that every kind of pet can carry germs that make people sick, even when the animal looks healthy. Handwashing, keeping animals and their supplies away from food areas, and regular veterinary care protect both you and your animal. Some animals, especially reptiles, are not recommended for homes with children under 5, adults 65 and older or people with weakened immune systems.
Housing rules for ESAs of any species
FHEO-2020-01 has been withdrawn by HUD, effective September 17, 2025. In enforcement guidance released on May 22, 2026, the agency treats requests for task-trained animals as presumed reasonable, but untrained emotional support animals get no such presumption and are judged one request at a time. That guidance also dropped the 2020 view that housing providers could never charge fees for an untrained ESA.
Day to day, ordinary pets like dogs and cats usually draw fewer questions than unusual species or a large group of animals. The Fair Housing Act remains in force, as does the HUD rule at 24 CFR 100.204; your state may offer added protection; and any real damage your animal causes is yours to pay for. See your state guide for the local details.
How an ESA letter covers your animals
With ESA Letter Therapist, you schedule online, then speak with a licensed therapist for a short call (5 to 10 minutes, phone or video). When the therapist decides an ESA fits your needs, a signed PDF letter typically reaches you that day, ready to pass to your housing provider alongside your accommodation request. Pricing is $129 for one or two animals and $199 for three or more, and you're charged only when your letter is issued.
