So I don't know why, but every single time I choose "Bow" the Ancestor is always pleased. I've chosen "Bow" 6 or 7 times (4 of which were in a row) and I've never gotten anything other than pleased. With "Howl" or "Growl" I never get Pleased more than once or twice in a row. It doesn't feel right to me, so I've just been selecting "Howl" or "Growl" lately.

Yes, depending on which wolf bows, if they have a lot of Spirituality CP, they have a higher chance of pleasing them.

Locking as this is not a bug.