They sell at PetSmart, Petco and any pet store, nail clippers for cats, for around $6.99. I started clipping Montgomery's nails when he was 6 weeks old. Well I didn't, the vet at the HUmane Society did. Then I started doing it at home with the clipper and he hated it. I tried with a small nail clipper for humans and he loves it now! Whenever I take out the nail clipper to use it myself, he comes running and shows me his front paws - cute!