I have a 7 yr. old black lab named rowdy and 5yr old cockapoo BoBo and 3 8yr old cats oreo, blossom, and Buddy all of them have grown up together now after all this time BoBo the cockapoo has started at various times attacking the cats or somtimes rowdy, they all at various times sleep in our room, and suddenly in middle of the night BoBo will jump on one of the cats . they are all spayed and neutered . and I am not sure if the issue between BoBo and cats is the same as with rowdy, who he has also attacked in the same way . all in the last couple months he had never done this before, also when the dogs are chewing on there treats BoBo will hold his and then try to take Rowdys I wonder why this behavior after all this time they have gotten along so well?