With a purebred dog, you can predict what the dog will be like as an adult. Every purebred dog was bred for a purpose.
Collies are born to protect. Because of this, they are wonderful with children and small animals. Collies have an instinct to watch over young ones, whether lambs or children, and herd them away from danger.
You will know that a collie was bred to protect other animals and so can be trusted to love your kitty. With a mixed breed, it may look cute as a puppy, but will
it stalk cats for fun as an adult?