I think I've seen it on here as guarding?
There was a small discussion about this in my intro thread... my 5 yr old female golden retriever has been WONDERFUL with our new GSD puppy (6 1/2 wks - had him since he was 5 wks). She is sharing her toys with Knuckles and even sharing her "favorite" toy, a stuffed pheasant. (we didn't expect her to, but she lets him chew on it while she's chewing on it!) She lets him chew on her lips, her ears, her legs, her tail. She play bites with him and is so gentle it's actually comical considering how big she doesn't know he's going to get.
But then we get to the food bowl. I have gotten Knuckles his own bowl, but she still gives, what we call, the "Elvis look" when he gets near her when she's eating. And for those of you who remember my intro thread, I have since stopped free feeding because of this, but what ends up happening is Saki just eats when Knuckles is sleeping.
I know the simple solution is to feed them separately, but I am hoping there is something I can do to get Saki to knock it off. I've even tried feeding her out of my hand, in the bowl, while Knuckles is eating and praising the heck out of her for eating nice... but as soon as my hand is out of the bowl the lip comes up. And yes, she will snap at him if I don't stop her.
I feel like I'm telling her to NOT EAT instead of not doing the lip thing. She backs off of the food bowl all together when I tell her no.
I have NEVER had a dog do this before and I've had quite a few dogs in the past. They have always just eaten, free fed, out of the same bowl with no issues whatsoever. Whats even more puzzling is that Saki came to us as a puppy and we had an adult Pomeranian which we got rid of a year ago and she had no problem sharing food with him. She doesn't like to share her toys (guarding?) with other dogs, either, which is why we were surprised with her sharing toys with Knuckles.
Any ideas how to get her to stop this behavior? I just don't want her snapping at him during feedings if he gets too close to her.