Willa (pit) is with us about a year now and has always given way to the little girl Molly (rescued Maltese/Shih-Tzu mix now 9yrs old). Willa is an interesting case there though, as she is non-dominant, but without being timid (she's been judged as a good candidate as a therapy dog and we're working through the second level of formal training for that purpose). When with other pits, or larger dogs in general, for playtime she's first into the mix at all times and never shows any fear or uncertainty facing any situation. If a male tries to mount her (she is spayed) she very quickly puts him in his place, even pinning at times, then goes right on back to playing with him and others around. In the house though, or in our backyard, she always lets Molly lead. Bea is picking up a lot from Willa, she follows her everywhere, plays with her until one of them has had enough (she's quite a big bigger already than in the vid above), and is acting just like Willa - not fearful or timid in any number of different situations we're exposing her too, but gives way to Molly in their interactions, same as Willa.