If you’re bringing a cat into a home with other pets or another pet into a home that already has a cat, don’t just put them together and hope everything works out. Cats tend to be very territorial, and they also need time to adjust to a new environment. A new cat should be kept in a smaller space such as a bedroom or bathroom for at least the first few days. Slowly introduce them — first letting them smell each other, then eat on opposite sides of a door, then short play times together, etc. — and you’ll help them acclimate better.