Just reading back and realised that my initial reply to your question which was this,
was rather brusque, if not downright rude!
My apologies. Trying to multitask and not doing very well at it at the time.
I don't know why Tull and Sylph are so different compared to Mow in their interactions with me. I think it may have something to do with the differing lengths of time Fret spent mother the two hatchings and that Tull and Sylph dealt with me as a pair whereas Mow took a backseat to Dig while he was alive and after spent more time under the infuence of Fret. It's not as if Mow actively dislikes me, but her attitude towards me is much more like Fret's. Both Tull and Sylph gravitated towards Henry much earlier than Mow and Henry is about as relaxed about my presence as self preservation permits.