you know how we all get warnings about suspisious moles , is it the same with dogs? i just wondered as i've noticed two black mole type areas on our foster labs' anus area and also on her vulva i'm not100% sure that they were there when we first got herb a few months ago but ive tried to clean the areas and im sure its not dirt of any describtion, she does have a medical history of  mast cell tumors that she had removed in the summer, so i'll probably take to the vets  just to be sure but just wondered if any one had come across this before. 

Anyone?