I was going to post on this same subject, thank you folks for the excellent links. I have a question. We have two new small dogs (25-30 pounds) which we got about 6 months ago. The (neutered) male is perhaps approaching 2 years old, the other was a puppy when we got her.
The male has been food aggressive towards the female since we brought them into our home. Often out of nowhere if she goes to close to him when he has a bone he'll bite her and the next thing we know she is screaming out. Most of the time it seems to be more bark than bite, she is never seriously hurt and often 2 minutes later she is going at him and they are playing. Of course nonetheless we don't like it and don't want him being aggressive towards her.
Even though he has always been food aggresive towards her, he was completely and totally docile towards us, I could walk up to him and take a bone out of his mouth and he would express 0 anxiety. Now I'm concerned because out of nowhere the last couple of days, he's started to show food aggression towards me.
Raising of the lip, and snapping in my direction. I then chastised him in a firm voice at which point he totally backs down, but in reading the links I see that may not be a good move. I should note we have bones and things they can chew on all over the house, as previously to implementing that they were being very destructive.
Anyhow, I intend to read everything in the thread that was linked to and perhaps buy the book as well. I've given all this background as a way of asking a rather simple question, which is, is it common that a dog would go from being completely non food-aggressive towards us, to starting it with us?
Otherwise this little fellow is extremely loving and strongly seeks approval from us.
Thanks