If the drier was hot, untangling it may be impossible as the synthetic fibers may have melted somewhat causing the mess. All you can really do is to take a comb and work from the bottom to the top attempt comb out the wig as much as possible. If this is an expensive wig, I would take it to a local wig shop to see if they can rescue it for you.
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Lori McLaughlin
Your veterinarian should ALWAYS be consulted first and foremost when your pet's welfare is at stake.