How do you stop a dog from killing cats?

About the only way is to keep the dog away from goats. If your dog has already had a meal of goat chances are would be more than happy to do the same again if given the chance. Eating goat would be a normal instinct for a dog just as eating chickens or mice would be. Some dogs have a stronger connection to this natural prey instinct than others and the only thing we can do is to keep the dog from getting into situations where it is tempted.