African Dwarf Frog Question - Help!?

My idiot sister bought two very tiny ones at a spring fair Sunday and then forgot about them. Her toddler lost the little packet of food that came with them and we can't get more food until tomorrow. I saw on wiki that these guys can eat shrimp. Is it ok to shave off a couple miniscule pellets from a shrimp and feed them? Also, these are very tiny - about 3/4 inch long. Thanks for any help!