As you know I have a rescue lab/chow/pittie mix or something of the sort. He has these strange episodes that culminate in agressiveness against the corgs. His strangeness usually happens over a few days.  We have had forest fires around here resulting in a lot of smoke and for 3 solid days last week he stayed in the back yard ALL day. We reckon he may have been protecting us or maybe there was a bitch in heat around us. What do you all think.