It's not good to feed them whenever they're hungry. Being opportunistic feeders, like most other snakes, if the conditions are right they will eat what's there. Because they don't know when their next meal will be. It's healthy for them to have at least a week between meals at that age, maybe 5 days if it's a ravenous hatchling.

Stick to a 5-7 day schedule for feeding. That's how they evolved, and that's how they are healthy.