[anonymous]

If your dogs are in good condition at age 12 (seniors) you are doing a good job.
I would hesitate to make any drastic changes to their diets.

“If it ain’t broke, don’t fix it” 🙂

If it is within your means, a senior workup (labs and exam) would be a good idea, dentals may be needed, you can’t tell by looking. Periodontal disease can cause a multitude of problems (medical), not to mention pain and discomfort.