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Jurassic Fight Club, and shed teeth

Question from a non-paleo engineer

Four raptors (out of ... ten?) killed bringing down dinner. Either this has to be a seriously unusual situation or the raptors breed fast and don't eat very often. The math doesn't work.

I keep hearing about shed teeth at "dinner sites" (consumed carcass areas?) showing who ate what. A given theropod has, what, 40-80 teeth? Do some math. How many can he shed at each meal? How fast do they grow? If he sheds two of 40 per meal (meaning there must be three or four theropods at dinner given the number...? of teeth found) and eats twice a week, each tooth takes 10 weeks to grow back? Does that math work with known tooth replacement rates of Gators?