My two little brutes

I'm not sure what's going on lately with my kiddos, but they aren't acting so great. They are constantly arguing about something or whining or worse *cringe* screaming. 2 days ago the bigger one knocked the little one into the window sill and gave her a shiner. Yesterday she smacked me in the cheekbone with her head. I don't have a bruise, but the bone is very sore to the touch. Ouch! Last night the big one knocked the little one down a few stairs because she was charging at him...like a bull I guess. Is it a full moon? What's the deal? They are normally pretty good. Momma needs a night out! (and some ice for my cheek)