I need some help dealing with some agression going on between by two dogs. I have a male Pembroke Corgi that is 3 and 1/2 years. A year and half ago I brought home a black lab/sheppard mix puppy. At first the lab was really shy. After a month or so the Corgi started to get snippy with the puppy if the lab went near his food. After that incident I promptly began feeding them separately in their own crates. Both of them sleep and eat in their crates which is in my bedroom. That worked fine until I started to give them bones in their crates. Even though I was giving the same bone to each dog the Corgi would bark at the lab between crates. I read a ton of articles that said I needed to reinforce that dog that is showing signs of alpha dog so I made sure to take the corgi out first and feed him first. All of that has died done now and they have been getting along great for several months. The lab is now 1.5 years and is 70 lbs. Within the last week the Lab has started to show signs of aggression with the Corgi. Last night the corgi needed out so I let him out. On his way back in he had to pass the Labs crate and the Lab went crazy. Thank god she was contained because it would have been a fight. The Corgi proceeded to get in his crate and bark back at her and was showing teeth. This happened for about 5 minutes then they went to sleep. This morning I feed them in their crate when I woke up. The Lab finishes her food in under 5 mintues and then looked over at the Corgi and started snarling again at him. The Corgi snarled back and I raised my voice and said "hey" and they stopped. I am not sure how to resolve this issue. I am afraid to leave them alone together so one is outside and one is inside while I am at work. Is there a way I can get them to get along?