Thousand animals? Let's calculate!
6 years = (365*6) = 2190 days of possible cooking
I cook a lot, about 5 times a week. The other two are saved for leftovers or going out or microwave crap or oven-baked pizza. So, let's say that buddha cooks 3.5 days a week. That's half a week, so...
2190 / 2 = 1095.
So, quite possibly, 1,095 animals!
But, what if he cooked clams or shrimp or ground beef? One clam is one animal, as is one shrimp. Also, I'm sure there's meat from multiple cows in a pound of ground beef.
So let's say 1,100 animals, +/- 150.
...damn, I'm hungry now.