I have male and female GSD. She started her heat last Monday June 1, 2015. On June 7 they both experienced their very first lock. My female cried and cried and cried. It was horrible! My male seemed very calm and kept looking at her as if to say he was sorry. I know, sounds weird but it was evident he was worried. Everyday since then she keeps pawing at him, whining at him and he won't have anything to do with her. She's still bleeding but he won't even try. He actually snaps and growls at her. Female is 5 and male is almost 2. Did something happen to him that I don't know about? He's not in any pain, he'll play with her, chase the ball and walks just fine. He's not licking excessively, so I don't think he's hurt, he just doesn't want anything to do with breeding, whereas, before the lock, we couldn't get him to leave her alone and she was the one snapping at him. What's going on?