Hi guys! Situation in a nutshell...3 adult cats, 3 kittens about 3 months old. Introduce 6 week old chocolate lab puppy (Snickers). All of the cats either ignore or stay clear of Snickers except for kitten Gizmo. He made friends with Snickers immediately after we brought her home. And now, he's become her living chew toy! Snickers actually bites his ear or his neck and shakes back and forth! And the stupid kitten just goes limp and takes it. If I separate them, he goes running back for more. My husband says Gizmo will let her know when enough is enough, but I'm worried. Gizmo runs sometimes then comes right back and stalks her. Snickers is younger than Gizmo but much heavier. Should I be worried? Anyone been through this?