Nails should be trimmed every 3-4 weeks. Long nails can lead to a longer list of problems including injuries and arthritis. Attempting to do your dog's nails at home without any knowledge or experience can be detrimental to your dog's confidence and behaviour down the road. Most often, failed experiences at home are the major cause of fear and aggression when it comes to getting their nails done. Rely on a professional to help create a pleasant experience.