[Lordaeron] "They Grow Up So Fast" bugged?

I recently finish the requierements for the mission but i can't complete it. Is it bugged or is an error of mine?
https://imgur.com/RNNWxTw

Also happening to me

I destroyed the hatchling from the inventory, abandoned the quest (didn't lose the teeth) and took it again, that fixed it and I could finish it.

I abandon quest and retook it and it worked. Thanks for the help!