As already mentioned, it does depend on the speicific dog.

Growing up, I had a rough coat colle (like Lassie), Our next door neighbors got a kitten when ou dog was aobut a year old. We have photos of the two of them curled up together on the grass in the sunshine napping!

If you google: collie rescue (no quotes around it) you can locate a collie rscue group near you. Most rescues use foster homes. If the foster home has a cat or other animals they can tell you how this dog is around them. Also, sometimes the dog has to move to another foster home because it didn"t get along with the cat or whatever other animal and they will tell you that as well.

Going through a rescue, you will learn a bit more about the temperament of the specifi dog than what a shelter would be able to tell you. Plus you will have a support group to turn to when asking questions ( in addition to us here on PT, that is! )