My barn manager has her two OTTB geldings on Probios. The one shone like glass all summer and fall. She got the second gelding this fall, he had been pasture boarded and was skinny and dull-coated. We body clipped him and he was still skinny and dull-coated. Fast forward to now, and his summer coat is coming in and now it, too, shines like glass. He’s possibly even shinier than the two warmblood mares we have who are just very, very thrifty and shine year-round.
I’ve never heard of Probios being recommended for shiny coats, and I’ve read that horses shouldn’t be on probiotics for extended periods of time. But I want all of my horses to be that ridiculously shiny, and it’s pretty cheap. Anyone have any experience with Probios and shine?