So I have a pair of calls. They have always gotten along great, last spring the male was a little rough but not bad. Well, this past month I introduced a new female, so its a trio. I've noticed him getting a bit more aggressive towards me, charging my boots and such, but not bad. And he's ALWAYS on top of "his" female. I've never seen him doing it with the new one. Well, this morning when I went out there was a bit of dried blood on the back of the female's head. Now, it always gets bare-ish in the springtime as a result of him, but never bloody. So I let her swim, then examined it more closely. It appears that she had a scab there and he somehow pulled it off. She's not in pain, and it was only a little bit of blood, but should I be worried? Should I separate them? I mean, they are VERY closely bonded, but he is just so aggressive that I'm afraid he is going to hurt her. Advice?