Most dogs tend to wear their nails down by walking on hard ground, but some dogs require their nails clipped regularly. Most vets, vet nurses and groomers are able to clip nails, but if you want to do it yourself at home, it can be done if your pet is fairly well behaved and easy to control. Cat nails can also be clipped, although they should be left intact for defense purposes in outdoor cats who may need to fight with other cats. The first step is to purchase an appropriate pair of pet nail clippers from the pet store or vet clinic. Medium and large dogs need large nail clippers, but cats and small dogs need small clippers. It often helps to have an assistant hold the pet while you clip it's nails.