Help! Urgent! Dogs in heat!?

Whenever my female dogs go in heat, my male dogs start fighting each other and refuse to eat. I end up throwing away their uneaten food and they end up horribly thin and covered with wounds. It's becoming very distressing. How do I put a stop to all this? Do I have the females spayed or do I have the males castrated? I'm just so fed up with their bloody raging hormones!!!