Hi everyone, Lately I'm starting to notice that Kynda (Caucasian Ovcharka/German Shepherd/Great Pyrenees) is starting to challenge our other dog Brooke (golden retriever). Brooke has always been the top dog in our house. She was here first, and Kynda has always respected that. Today I was watching Kynda chewing on a bone when Brooke came along and tried to take it from her (As she has always been able to do). This time Kynda didn't let Brooke take the bone and hung on tight while Brooke was trying to take it. Kynda then stood up and started to play tug-of-war with Brooke over the bone. It didn't look like Kynda was 'playing' though. Her body language looked like it was saying "hey, back down, I'm the big dog now and this is MY bone." Her ears were straight forward, her legs were stiff and she even let out a growl which we don't usually hear out of her unless there's a dog outside. Brooke eventually backed down and let Kynda chew on her bone. There's been other occasions lately where Kynda has nipped at Brooke when she was trying to eat her food. I'm not sure if I should be concerned about this because we don't have any experience in owning two dogs at once. Is this all normal? Do I need to do anything, or should I step back and let them sort it out. Brooke is 15 months, and Kynda is 13 months. Thank you, Jess