25 to 30 thousand calories
Thats what an adult bear needs to eat this time of year. Picture 45 to 50 hamburgers a day. Yikes!
They'll eat all kinds of stuff: dig through trash and compost piles, turn over rocks to eat ant eggs, rip apart logs for grubs. They'll climb through a screened window and raid a refridgerator.
The other day, something tore apart a landscaping railroad tie that housed a yellow jacket nest. That's my second suspcion.