When you have an older dog who has hip dysplasia or painful arthritis in his hips, grooming becomes a new challenge. Your pup still needs to be groomed, but at the same time, you need to make adjustments to the way you do so in order to protect your dog and continue making grooming a pleasant experience. You will need to make a few changes in how you do things to allow for the fact your dog may not be able to stand for long periods of time without pain. There may come a time when safety outweighs your desire for him to look his best.
Your dog loves looking and feeling good, but at the same time when he has painful hips, this can make the entire grooming process a painful experience and one that he wants to shy away from. Your dog's comfort and safety should always be your highest priorities. Take your time and be careful--the last thing you want to do is cause your pup any unnecessary pain or, worse yet, to have him fall and injure his hips.
Just because your pup has hip dysplasia doesn't mean you can't keep him clean and groomed. It just means you need to be more careful. Much of the grooming can be done with him sitting or laying down to save him from excess pain. Grooming an older pet can still done be at home, it just takes more time and patience.