One of my mares, who is a naturally nervous mare, has constant soft stool. Not like a cow patty but more of a soft dropping with some liquid. With winter upon us, it is getting all over her blanket and some on her rear end and tail. I have wormed her and recently treated for ulcers. She gets grass alfalfa mix, Running Horse Feeds Prime and Exceed 6 Way. My vet does not seem concerned but we just have large animal vets around here not actual equine vets. Is there something I am missing? Is this a common thing in more nervous horses? Can loose stool hurt her skin or tail if it sticks to it too long? Thoughts on getting a catslick so she doesn’t get anything in there to cause infection? Thanks in advance!

I would put her on Forco, its a wonderfull supplement for the gut. 

I have a gelding like this - he is ulcer prone. Gets just loose enough stool to get his tail gross. When I am hauling him or stalling at events it is more loose than at home. I keep him on GastroPlex and it helps him incredibly. The Exceed 6-Way you are feeding offers gastric support, but you may need the higher levels of active ingredients in the GastroPlex, for more targeted gut support. 

Thanks ladies. I will find a gut support product to help! When I did the ulcer treatment, I just did the 30-day zesterra routine.

Alfalfa will give them the runs

Forco or probios...  both very effective and inexpensive! 

that sounds like one of mine..... i tried probios and forco - didn't help. I'm trying BioEz  now but i'm not seeing a big change. his tail is still dirty and that drives me nuts!

I forgot bio-sponge by platinum too.. I've never used it but I've heard excellent things about it

I would start by changing feed.Change one thing at a time and give it time to work.