Is it normal for my hamster to hide all of its food in its tunnel? She also does it with bedding?

its normal, hamsters like to build nests, and just feed her once a day. Completly normal, nothing to worry about. About the chewing, my hamster does the same thing! i gave her toilet paper tubes and she seems to like that, chewing on the bars wont hurt her though, its trimming back her teeth.