Female lab humps my brown lab male

Question
My female yellow lab is 10 months old now, and she humps my chocolate male lab which is a year and a half old. I would really want it to be the other way around. I want them to breed. Why does she do that. And do labs on average start there first heat?

Answer
Hello you shouldnt breed her on her first cycle but on her second or third she will likely be in heat anytime now and for her healths sake wait for another cycle at a later date she isnt even fully grown yet! Shes mounts and humps the other dog because she is stating she has domance over him if he doesnt do this back or offen gives up in wresling matches she is indeed the top dog.