[anonymous]

I would not make any drastic or sudden changes to a a senior dog’s diet, especially if the senior wellness checkup, including labs (recommended to be done at age 7) comes back within normal limits, including the dental.
I would schedule the checkup asap rather than in a few months and listen to your vet’s recommendations.
PS: Rule out medical problems first, don’t assume that behavioral changes, lack of energy, changes in appetite and such are age related.
Lab work is the best diagnostic tool that the vets have, you can’t tell by looking. You may be able to catch disorders early when they are more likely be receptive to treatment.