I have a really soft teddy bear the size of my 4 month old puppy and when Isabella found the stuffed bear she started humping it like you would see a boy dog do. IS that normal? Has anyone seen a female dog do this? I am sure she is a female and she has been to the vet atleast 4 times and they haven't said anything to me about her being a boy. Today is the first I seen this but shes been doing it all day!