What to Do in Your First Week With an Adopted Pet

Your first week is about safety, routine, and letting your pet adjust

The first seven days with an adopted pet are not about bonding or training — they are about keeping your pet safe while they learn where they live. Your pet has lost their previous home, spent time in a shelter or foster situation, and now faces a completely new environment. They are stressed, disoriented, and may not behave the way they will in two weeks. Your job is to create a small, predictable space, stick to a feeding schedule, and watch for signs of illness or injury.

Most adopted pets need three to five days before they stop hiding or acting fearful. Some need longer. This is normal. Pushing interaction or expecting them to be comfortable immediately will slow their adjustment, not speed it.

Key Takeaways

• Set up a single room with food, water, a litter box or pee pads, and a hiding spot before you bring your pet home, so they have a safe place to decompress.
• Keep your pet confined to that room for at least three to five days, even if they seem ready to explore — a smaller space reduces stress and makes accidents easier to manage.
• Feed at the same times each day using the food the shelter or foster provided, and ask your veterinarian before switching brands, because diet changes can cause digestive upset.
• Schedule a veterinary visit within the first week to check for injuries, parasites, or illness that may not be obvious, and to establish a baseline for your pet's health.
• Watch for vomiting, diarrhea, loss of appetite, or excessive hiding beyond the first few days, as these can signal stress-related illness or a pre-existing condition.

Set up a single room before your pet arrives

Choose one room — a bedroom, bathroom, or office works well — where your pet will spend the first week. This room should have a door that closes and no escape routes. Stock it with food and water bowls, a litter box (for cats) or pee pads (for dogs or cats), and a hiding spot. A hiding spot can be a cardboard box with a hole cut in the side, a cat tunnel, a crate with the door open, or even a closet your pet can access. Adopted pets often hide for the first few days, and having a safe place to do so reduces their stress.

Put the food and water bowls in one corner, the litter box or pee pads in another corner as far away as possible, and the hiding spot in a third. Cats and dogs naturally avoid eliminating near where they eat and sleep. If you crowd everything into a small space, your pet may have accidents because they have nowhere to go that feels separate from their food.

Keep the room quiet and dim. Close the blinds or curtains. Do not play music or leave the television on. Your pet is already overwhelmed by new sounds, smells, and people.

Stick to the shelter's feeding schedule and food brand

Ask the shelter or foster what your pet has been eating — the specific brand and type — and continue feeding that for at least the first two weeks. Changing food suddenly can cause vomiting or diarrhea, which will stress your pet further and make it harder to tell if they have a real health problem. If you want to switch to a different food later, your veterinarian can tell you how to do it gradually over seven to ten days.

Feed at the same time each day. Most adopted pets do better on a schedule: breakfast at 7 a.m., dinner at 6 p.m., for example. A schedule helps you predict when they will need to go outside (for dogs) or use the litter box, and it signals to your pet that their new home is predictable and safe.

Leave water out at all times. Do not restrict water to teach housebreaking — that is outdated advice and can cause dehydration or urinary problems. Your pet may drink more than usual during the first week because they are stressed.

Take your pet to a veterinarian within the first week

Schedule a veterinary visit before or immediately after you bring your pet home. Shelters do basic health checks, but they do not catch everything. Your veterinarian will look for injuries, parasites, ear infections, dental problems, and signs of illness. They will also check your pet's age, weight, and overall condition, which gives you a baseline for the future.

Bring any paperwork the shelter gave you — vaccination records, medical history, behavior notes, or microchip information. If the shelter did not provide records, tell your veterinarian. They may recommend testing for common shelter illnesses like feline leukemia (for cats) or parasites.

Use this visit to ask about flea, tick, and worm prevention; vaccination schedules; and spaying or neutering if your pet has not already had the procedure. Your veterinarian can also answer questions about your pet's behavior or diet.

Watch for stress-related illness and injury

Some adopted pets vomit or have diarrhea in the first few days because of stress, not illness. However, if vomiting or diarrhea continues past day three, or if your pet stops eating, contact your veterinarian. The same goes for excessive hiding — a pet hiding for a day or two is normal; a pet that will not eat or drink and hides for more than three days may be sick.

Check your pet's body for wounds, bald patches, or signs of abuse. Shelter animals sometimes come from difficult situations. If you find injuries, photograph them and tell your veterinarian. Some injuries need treatment; others are healing on their own and just need monitoring.

Adopted pets sometimes have upper respiratory infections (sneezing, runny nose, watery eyes) or skin conditions that were not obvious in the shelter. These are treatable but contagious to other pets, so keep your new pet away from other animals in your household until your veterinarian has cleared them.

Introduce other pets and people slowly, or not at all during week one

If you have other pets at home, keep them separated during the first week. Your new pet needs time to adjust to their room and routine without the stress of meeting other animals. Your existing pets need time to adjust to a new smell and sound in the house. After a week, you can begin introductions under supervision — let them sniff each other under a closed door, or use a baby gate so they can see each other without direct contact.

Limit visitors during the first week. Every new person is another source of stress. If family or friends want to meet your pet, ask them to wait until week two, and then keep visits short and quiet. Do not let visitors pick up or handle your pet unless your pet approaches them first.

Recognize signs that your pet needs more time or professional help

Most adopted pets settle into their new home within two to four weeks. Some take longer, especially if they spent a long time in a shelter or came from a difficult background. If your pet is still not eating, still hiding constantly, or showing signs of fear or aggression after two weeks, contact your veterinarian or a certified animal behaviorist. Fear-based behavior can worsen if it is not addressed, and your veterinarian can rule out medical causes.

Some shelters offer post-adoption support or can refer you to a behaviorist. If your pet came from a rescue organization, call them — they often know the pet's history and can offer advice specific to your pet's background. Do not assume your pet will "get over it" on their own. Early intervention makes a real difference.

Frequently Asked Questions

How long should I keep my adopted pet in one room?

At least three to five days, longer if your pet is still hiding or showing fear. Once your pet is eating, using the litter box or pee pads consistently, and moving around the room without hiding, you can open the door and let them explore the rest of the house under supervision. This usually takes one to two weeks.

What if my adopted pet has an accident outside the litter box or pee pads?

Do not punish them. Accidents happen during the adjustment period and are usually caused by stress, not disobedience. Clean the spot thoroughly with an enzymatic cleaner so your pet does not smell their own waste and return to the same spot. If accidents continue after two weeks, contact your veterinarian to rule out urinary tract infections or other medical issues.

Can I take my new pet outside during the first week?

For dogs, yes — they need to go outside to eliminate. Keep them on a leash in a fenced yard or a quiet area, and do not let them off-leash or interact with other dogs. For cats, no — keep them indoors during the first week. Outdoor cats can become lost or injured while they are still disoriented and unfamiliar with their new territory.

What if my adopted pet is aggressive or bites during the first week?

Fear-based aggression is common in newly adopted pets and does not mean your pet is dangerous. Do not corner your pet, reach into their hiding spot, or force interaction. Give them space and let them approach you. If aggression continues or escalates, contact your veterinarian or a certified animal behaviorist before the situation worsens.

Should I start training or teaching commands during the first week?

No. Your pet is not ready to learn. They are focused on survival and adjustment, not on pleasing you. Wait until your pet is eating normally, moving around comfortably, and showing interest in you — usually two to three weeks in. Training will be more effective and less stressful for both of you.