[anonymous]

Is the dog overweight? Is he getting enough exercise? Maybe your adult children could take turns taking him for a brisk walk for an hour a day instead of complaining. Are you feeding him too much?

It sounds like he needs more activity/exercise and maybe less food.

PS: Regarding probiotics:
Homeopathic views differ from traditional medicine.
Here is a science based view, if anyone is interested
http://skeptvet.com/Blog/?s=probiotics