5 weeks is way too young to be away from their mother, I would stay far away from this breeder. Also 75 dollars isn't what I would be looking at when I was looking to get a dog. I would look at a shelter who would do screening for dogs, usually they will know if a dog is good with cats or not. Huskies can have very high prey drives, but some are just fine with small animals. Really its up to the dog, but backyard breeders are not reliable people to buy a pet from and they will likely tell you anything you want to hear. I would run for the hills when it comes to this person.