thanks for all the advice ladies and gents.
i fed him the pinkies because thats what they said at the store they had fed them the last time. but i guess it is time for an upgrade.
and thanks, nate, for the program link. i knew i had seen it on here, but since its for PC only, i didnt download it (mac user).
but my roommate has a PC so i put it there, (hence how i got to 22 instead of 15, haha).
i should be feeding him/her (i really need to find out what it is...for now its just Codeine) again this weekend, so i'll try for a bigger meal.