
Actually it is the male who is starting the aggressive behaviour(well food guarding to be correct)I would remove him or the chew so that there is no confrontation
I have one male cavalier who does a lot of threatening & he has his treasure removed when he starts & the younger two only have something to chew when they are separated, this prevents any problems..The older two don't bother with others treats or biscuits etc
There are some dogs who will guard treats & some who don't so avoiding problems is better than having to stop them. It is quite normal for a dog who food guards