We all think that training is all about sitting, shaking, staying, and laying down. But we all need to start training puppies to be brushed, have their toenails trimmed, and have their teeth brushed. The earlier you can start doing these things the better. It would be difficult to start at an older age to perform these tasks. Be sure to check with your veterinarian before trimming toenails to prevent bleeding due to cutting too deep. You might need the veterinarian to trim them for you. You need to have a good relationship with your veterinarian for a healthy and happy puppy.