We have a 26 year old gelding and an 18 year old mare and want to be sure we are providing for them well. Just wondering, what do you folks do beyond normal diet, care., etc.? Ours are on good pasture most of the year and they also receive good mixed grass hay. We do give them a general vitamin supplement but not much in the way of other grain supplements because both tend to get chunky real fast. I've been reading about the need for probiotics, etc. for the aging horse and just wondered if there are things I should be doing as a preventive measure? Both horses are very healthy and still have great energy! I just want to help them keep feeling good and stay healthy as can be.