Let your puppy sniff the nail clipper or grinder. Give a treat and praise.
Day 2: Touch the nail clipper or grinder lightly on each paw. Give a treat and praise.
Day 3: Touch the nail clipper to each paw and squeeze the clipper so the puppy hears the sound, or turn the grinder on and let the puppy feel the vibration. Don’t actually trim a nail. Give a treat and praise.
Day 4: Touch the nail clipper or grinder to your puppy’s feet again. Give a treat and praise.
Day 5: Try trimming off just the very tiniest tip from one front paw nail. Only do one nail. Offer lots of happy praise and a treat if your puppy lets you.  Even if he lets you, just do one. Repeat every day until he lets you do this and doesn’t seem to mind.
Day 6: Try trimming just the tip off of just two nails.
Day 7: Keep working your way up, trimming additional nails each day, until you’ve got them all and your puppy doesn’t mind. Practice even when you don’t need to clip a nail. Even pretending you are clipping and going through the motions helps your dog get used to the whole process.
How to Trim Your Dog’s Nails Safely