( CULLING ) I'll have to it with my wife in the house and not knowing what's going on for sure, but I've been dropping hints to her for the past couple of days it would be for the best.I went ahead and bought a bottle in case I need it, that was before I knew it was specific to MG. I'm a pet owner and I don't breed or show. If some of my favorite birds come down with MG they're getting Denagard.But for people that breed and show and that sort of thing I understand why they'd cull instead. I just don't have the guts to.