How to care for my senior dog?

My dog is getting up there in age, and I want to make sure I’m doing everything I can to keep him comfortable and healthy as he gets older. I know senior dogs have different needs compared to younger pups, and I want to provide the best care possible for him during this stage of life. Do any of you have tips for caring for a senior dog? Whether it’s about adjusting their diet, exercise routine, or dealing with health concerns, I’d love to hear what’s worked for you and your older dogs. Thanks in advance for all the advice!