Tonight I had a concerning incident with my 13 week old dachshund mix puppy. We bought him some sort of knee bone thing to chew on at the pet store this afternoon, and gave it to him after he had his first bath this evening, which he absolutely hated (vet gave us special shampoo for his flaky skin). He was really excited about the bone, but the cats were also interested and were trying to get it away from him. He got REALLY protective of it, and was growling at the cats, and trying to hide from everyone to eat it. I had to follow him and pick him up, he wouldn't surrender the bone to me and continued growling until he finally dropped it, and I took it away and didn't give it back again. He has NEVER been toy or food aggressive at all. You can put your hand in his bowl while he eats and he doesn't care. You can take treats or rawhides or toys away from him, and other than trying to play tug when you try to take a toy, he's never reacted in any way. Immediately after I gave him a different chew treat and he was totally calm again (sweet potato chewy, the cats have no interest). Is this a harbinger of doom, or was it just a fluky combination of stress and a really exciting treat that he didn't want to share? Did I handle it the right way? I was concerned he'd bite me if I tried to take it so I just held him until he let it go. Obviously, he won't be getting that or other similar treats again if he reacts so strongly to them.