One like: Dog Comb, Cat Comb with Rounded and Smooth Ends Stainless Steel Teeth, Professional Grooming Tool for Removes Tangles and Knots, Pet Comb for Long and Short Haired Dogs, Cats and Other Pets https://www.amazon.com/dp/B088BN4XD4/ref=cm_sw_r_cp_api_glt_fabc_W7JJWF3AYFN515KK7BKJ

Keep in mind it does need to be a very patient activity lol.