(Canada)
We have two cats (housecats spayed/neutered)one of them is pretty lazy but the other one is more energetic. When we have a dog in the house they pretty much ignore it but if it gets too close to them then the start hissing and stuff. The cats don't really like to play with toys, they get bored pretty easily... how would my cats react to a new pet?
Answer:
Chinchillas are rodents and considered by most larger animals to be potential prey. Cats and the smaller hunting dogs are likely to attack chinchillas given the opportunity. They should never be loose together.
But as long as the chinchilla is kept in the cage the cat would probably just consider it visual entertainment!