since you don't have a trainer nearby, you probably have to do the best you can. This is way too complex to analyse without having some professional help. Dogs should not have to defend their food bowls . They need to be fed separately if there is any guarding going on.
We feed all dogs separately and with their own bowls.
They also have their own water bowls but we have to keep his in his kennel or just outside.
All other dogs are free to drink off each other's bowl but they don't like the bullied GSD to drink from their bowls. They don't bother him if he sticks to his own provided it's not next to theirs.
We do separate them but was really hoping to find a solution to get them to get along.
I would have expected them to gang up on the Maltipom give his size. Didn't expect the Maltipom to be ring leader!
We cant give the Maltipom away, my mom loves him!
The Maltipom hangs out at the front of the garden and leaves the other 2 to hang out at the back.
They don't fight much but the GSD avoids the Maltipom and my brother's dog.
He's generally a happy dog but prefers being with humans (esp me) more than with other dogs.