My dogs never get fed near each other, it is just common sense with larger breed dogs. I feed them at the same time but around the corner from each other. Sometimes I just feed separately as I let them out for toilet in the mornings etc.
Phi can be a bit possessive with toys.
A good way to counteract toy guarding is to put out LOTS of toys so the dog guarding can't guard all the toys. This is what we do to counteract dogs who guard water bowls, we just put out 5 or 6 around each other and the dog will just give up.
But never leave the dogs unsupervised together with toys. (Actually they shouldn't ever be left unsupervised together anyways for so many reasons)