My dachshund mix, Molly, I had for one year before getting my beagle, Penny. Penny is a couple inches bigger and picked many fights over toys and bones at first (had her for over a year now). All of a sudden a month or so ago Molly will now attack Penny. Penny is usually always near me but not getting attention from me when this happens. I pull Molly back every time. They are crated when alone so not together. I try hard to not show more attention to one than the other. But geez it’s almost every other day now. Any ideas what I can do? I don’t have the heart to let them “fight it out” in case they are fighting for dominance.