1. The old cat hisses and gasps at the new cat, which means that the old cat is unhappy at this time and its territory is seriously threatened, so it will have a stress reaction. 2. The owner can temporarily separate the two cats to prevent them from coming into contact and fighting. After a while, the old cat will get used to the arrival of the new cat and they will be able to get along well with each other.

Tip:

When raising cats, owners should treat them equally, do not neglect one of the cats, and must not be partial.