I have owned 1 pair of these dog nail clippers and also the cat claw clippers for over 25 years.
I have cut many dog nails, large bird nails, and puppy nails with these. I have never had to have them sharpened and they have never not cut for me. I recommend these 2 products to everyone that needs nail clippers. They are so easy to use. My husband raises beagles and they have never left me down once. I absolutely love these 2 products.