I don't understand what is going on with Onyx' coat. It won't come out. She's a black dog so the undercoat comes through grey when it blows. That part I get. What I don't understand is why its holding on so hard? I've tried all of the tools I have on hand, the furminator, the grooming rake, the slicker, even just pulling it out by hand. Nothing is grabbing that coat! Crusher is already done his. He looks great, so beside him she looks like a homeless neglected freak! She doesn't seem to be suffering from the heat yet, as its not hot out, but its above freezing and her coat looks horrible. She doesn't have any mats or anything, I can comb right through it with the long toothed comb, even her tail and behind her ears is good. But that faded grey fur just wont let go! What can I do?