Better to get him checked physically and go for basic routine health screening tests, on the basis of finding supplements will be added accordingly.

The area to be checked up for your 7 years make Labrador is Weight control Musculoskeletal system with special care on hip health Which they normally tend to have hip arthritis Exam if possible hip X-ray Supplants Glucosamine and chondrotin and collagen based Heart health chest X-ray if possible for screening Cardio supplements KidneyLiver Profile to be screen with blood sugar Depending upon that if some supplements are required

There are various supplements which can help improve the quality of life in a aged epileptic dog like MCT oil, ayurvedic preparations and nervine tonics. But the dose and which supplements to opt for requires knowing more about the history of condition and status of present condition I recommend booking consultation for the same

Nerve supplements will help in the well-being of your pet. You can get him checked and get the needed extra supplements.