Last night I was thinking when that might have happened I had my pack. What I recalled was I let them work it out unless there was blood or more than a one on one situation... which only happened when they were young.
If he is encouraging them I would suspect his growls maybe warning notes of: "lighten up kids."
With Charlie in my life - it is the first time since I was 18 that I have one dog. Learning experience here.
I hope you can find a comfort zone with the situation. Sometimes I guess we have to trust out pets to know what their limits are.
Candle lit that peace prevail for all.
Love All Life, Thank You For Posting! :)