[FirstYorkie]

Can I amend my post? I took the easy way out...

Both YorkieMom and Rhiannon's posts were much more helpful than mine. YorkieMom's method is actually a well-accepted protocol for dealing with food-guarding amongst dogs. That is: handfeeding one for dog a and one for dog b, over and over, but only as long as both dogs are behaving. I like how she extended it to one for dog a in your bowl, one for dog b in your bowl. Don't get discouraged if it takes more than one session.

While working on the problem that way, I wouldn't let London practice bad behavior. If she misbehaves, I would take Rhiannon's suggestion and remove her from what she covets - the food. If growling and acting ugly leads to being fed, that behavior is accidentally being reinforced. If there is any chance she might snap at you when trying to remove her while she's in that mode, you could keep a leash on her at mealtimes so that you can remove her that way.

Should you worry? Yes and No. The yes side is that if left untreated, the behavior could escalate. It is best that you intervene. On the other hand, food guarding is VERY common behavior in dogs. It doesn't mean that London is bad, it just means she has "issues" (ha!) that you need to deal with.

I hope that's more helpful than my first post!