Have cast hair from the moose that shared my front car seat and laid his head on my lap , but those hairs were long , coarse , dark brown shading to white , and looked good clear cast against a red background on a Sierra . Results would depend a lot on colour and coarseness of the dog`s hair .
Have clear cast ashes from a ceremonial fire pit that had been used a number of times , giving a range of colour from black to gray to umber . I hand colour sorted a bit to ensure some range within each cast block , and painted the inside of each hole for the Sierra tube black after drilling . Results were a bit variable in colour , but deemed very acceptable by the client . The dog`s ash may be more colour uniform though .