When a new animal arrives, it's normal to want them to meet as soon as possible and see them become friends. That is exactly what usually goes wrong. The animal already living in the home feels that someone has entered its territory, the newcomer is scared, and a tense first meeting can mar the relationship for months. If you go slowly, the odds change significantly.
Before they arrive
Preparation begins a few days beforehand.
- Prepare a room for the newcomer with a bed, water, food, and, if it is a cat, its litter box and a hiding spot. This will be its base for the first few days.
- Double the resources. Each animal should have its own bowl, bed, and toys. For cats, it is recommended to have one litter box per cat plus one extra.
- Exchange scents. Rub a towel or a soft blanket on each animal and leave the other's near its bed. This way they begin to get to know each other without seeing one another.
- Check the newcomer's health. Ensure they have been to the vet, dewormed, and are up to date on vaccines before sharing spaces.
Dog with dog
Dogs are best introduced on neutral ground and while in motion.
- Meet on a quiet street or an uncrowded park, with each dog on a leash and a different person holding them.
- Start by walking in parallel, a few meters apart, without forcing them to approach. Gradually reduce the distance if both are relaxed.
- Let them sniff each other for a few seconds with a loose leash and separate calmly to keep walking. Several short contacts are better than one long one.
- Enter the house together after the walk, with the resident dog going first, and put away any toys and bones that could cause disputes beforehand.
Pay attention to the signs: a loose body, play bows, and pauses are a good sign. A rigid body, fixed gaze, tense lips, or growls indicate that more distance and time are needed.
Cat with cat
Cats handle change poorly, so patience is even more important here. The process can last from a few days to several weeks.
- Total separation at first. The newcomer stays in its room. They hear and smell each other under the door, but do not see each other.
- Exchange of spaces. Let each one explore the other's area while the other is in another part of the house.
- Visual contact with a barrier. An ajar door with a stopper, a net, or a baby gate. Give them food or treats on each side to associate the other's presence with something good.
- Short supervised meetings, with escape routes and high spots for both.
An occasional hiss is normal. If there is chasing, fighting with fur flying, or if one stops eating or using the litter box, take a step back. Having more than one scratching post helps each mark their territory without clashing; in how to choose a scratching post we give you some ideas.
Dog with cat
The key here is for the cat to feel safe and always have somewhere to escape to.
- The first meetings, with the dog on a leash and the cat free, in a room where it can climb onto high furniture.
- Reward the dog when it looks at the cat and stays calm, or when it looks away. Do not let it chase the cat "to play": for the cat, it is not a game.
- Protect the cat's areas. Food, litter box, and bed in places the dog cannot reach.
- Watch out for dogs with a high prey drive. In those cases, it is advisable to ask a dog trainer for help before leaving them together unsupervised.
Mistakes to avoid
- Forcing contact, such as holding the cat in your arms in front of the dog.
- Punishing growls or hisses. They are useful warnings. If you punish them, the animal learns not to warn.
- Neglecting the resident pet. Maintain their routines, walks, and time with you. If it feels it has lost its place, tension will increase.
- Leaving them alone together too soon. Until they have been living together peacefully for a while, separate them when you are not there.
When to ask for help
If after several weeks there are still fights, one of the animals lives in hiding, or you notice changes in their appetite or behavior, consult your veterinarian and a behavioral professional. Sometimes a more detailed plan is needed, and the sooner it is addressed, the better.
A second refuge for the resident cat or its own bed for the newcomer helps a lot during these days. In cat beds and rest you will find beds, caves, and hammocks so that each one has their own space.