I have a 9 month old male springer who really does not like my cats kittens. previous litters he has chased them and pinned them down. My cat has a litter thats just 9 days old. He today when i showed him 1 tried to grab her in his mouth. I would really like to keep her but im scared he will kill her. Any tips on how i can stop him from being soo nasty to them and get him used to them being there without having to keep them out of sight.