I just found out that Molly, who is sterilized, humps Tigger, who is a toy! Apart from the awkward moment (combined with a laugh, since NOTHING will ever come out of it) I would like to ask you, if your dogs do that? Molly is almost 5 and has never had any pups. She only humps the big Tigger, her small Tiggers are just battered and bitten. Is it "just" an issue of dominance?
Here she is during a "normal" Tigger-moment with one of the small Tiggers.