I am not sure if this is the right place to post this topic or not but i am looking for suggestions on a good breed of dog to use for predator defense that will be easier to teach how to not eat the chickens they guard. I would prefer something smaller than an elephant but large enough to scare off or kill opossums and raccoons. We have to inside dogs already. One is a shih tzu and the other is an old english bulldog. The shih tzu is too small but my wife has made a fifty pound lap dog out of the bulldog. Plus Bella( the bulldog) is scared of everything and her best weapon is terribly loud and foul gassiness which may attract rather than repel varmints. Any suggestions on which breed might work?