Hello, my dog seems to have really small dark spots under her armpit (one of them). They look like blackheads but are not pimples or elevated. They look like little scabs. Ive tried to pull them out to see if its a tick and its very hard to pull. It doesn t move. It does not seem to bother my dog either but they are all at the same spot. It doesn t seem normal to me. Do you have any ideas as to what it could be? I also checked her fur and I can t find any fleas... Maybe i didn t look well enough but she had a white coat, i mean, how hard can it be to spot...