how about you print this out and give it to your mom for reading material? her logic is grossly false but if you try to tell her this it will only aggravate the situation. however if it's factual information from trusted sources... it might do the trick
http://rawfed.com/myths/bloodthirsty.html
kaiden knows what's good for him, he wants and needs that fresh raw meaty goodness (as you saw!). i really hope your mom figures this out and if not, keep sneaking him as much raw as you can *without* being caught, to avoid trouble. Remember: in a few years you'll be old enough to move out, get your own place, and set your own rules. it is never too late to switch a dog to raw so keep that close at heart