Normal broody mama behavior?

[TN Chicken Chick]

So my first time broody hatched a chick yesterday (on Mother’s Day!) and I noticed that when she is interacting with the chick it looks like she nibbles a bit on its beak. Doesn’t look like “biting”, but wasn’t sure if this was normal. For those that have done this before, is this just curiosity or grooming, or something I should be worried about?

 

[JacinLarkwell]

Chickens don't have hands or fingers, so pecking is how they explore. It's also how they get their baby's attention