the only brush that has every worked for me is the furminator: https://smile.amazon.com/Furminator-Short-deShedding-Large-Standard/dp/B07MZD3ZVF/ref=sr_1_1?crid=3B0D7S6J84NHX&keywords=furminator+cats&qid=1659372759&sprefix=furminator+cats%2Caps%2C91&sr=8-1