I have a Cairn Terrier, the first time I used the clippers they worked ok (just okay), it took me hours to trim him.The next time they didn't do anything, so I had him groomed professionally. 3 months after a pro. grooming he was just a getting a little bit fluffy, I figured the trimmers might work better now that his fur isn't full grown, again they did nothing! I got as much fur off him as I would brushing him. These clippers are useless, I don't know if they are only made for poodle fur or if the blade is only good for one use. I wish I could get my money back, what a waste, they weren't super expensive but they were definitely not cheap either.