Please Help! What to feed pet snakes?

My daughter and I went to the Friday souk and she bought 2 pet snakes.
They are very small, light in colour with white bellies. They don't
bite. I think they are egg eating snakes because when we asked the man
what to feed them, he said put a hole in an egg and they will eat
that, one every 7 days. If they are egg eating snakes, obviously they
wouldn't be able to take a whole chicken egg into their mouth.

Anyway, we forgot to ask when they were last fed, so we tried tonight,
and they weren't interested. We don't know now if it's because they r
not hungry or they don't like the chicken eggs.

We r so worried about them. They r so sweet and gentle. We don't know
who to ask.