Dog owners sometimes feel a little uneasy about trimming their dog's nails. Don't be! It can be done safely and easily with the right nail trimmer and know-how. Dogs nails continue to grow throughout their life and their lifestyle will influence how often they need a nail trim. Dogs who walk regularly on hard surfaces like concrete will need their nails trimmed less often - a good reason to take them for a daily walk. On the other hand, dogs who spend a lot of time on soft surfaces like grass will need their nails trimmed more regularly. There are mainly two types of nail trimmers used to trim nails. Scissor action and guillotine action. Both work well but they do need to be sharp and clean. Like any sharp instrument, they will lose their edge and need to be replaced from time to time. If you keep your nail trimmer clean they should last a number of years.