My 5 year old lab Kainda, is in heat right now. ugh. How long does this last? I ran that dog 36 times in about 5 minutes up and down the hallway last night playing fetch and she never even tired. Labrador retrievers, are nothing like Golden retrievers. My goodness. No dog poop in the crate and her bowels have gotten more normal. Shes like a bulldozer going thru the house, seems she has no concept of anythign elses n the house but where she wants to go and be. But oh my is she pretty and she just wants your love, makes you love her even with her antics.