Our supplement collection is kind of a mish mash of stuff, so I've been looking around for an all-in-one possibility that might reduce the measuring and mixing as well as better suit Bestie and Dude's needs as "seniors." They've been on HorseTech's Glanzen GL for years, and I've been happy with it. It's mainly been Dude that has created the supplement complications, as various vets have suggested more vitamin E, probiotics and MSM for him.
I started by looking at additional HorseTech products, and turned up the Senior Reitsport, which has glucosamine, MSM, chondroitin, hyaluronic acid and other things like devil's claw, prebiotics & probiotics, and vitamins A, C, D and E plus B vitamins. As the company literature says, "complete support for hoof, coat, attitude, digestive tract and joints." HorseTech was nice enough to send me a 5 pound trial bag, so I gradually introduced Bestie to it. She seemed to love it, and has been on the new supplement since mid-June.
Right before I started investigating supplement alternatives, I had just purchased a new container of MSM for Dude, and didn't want to waste it, so he's still on the Glanzen GL mixed with the MSM, probios and vitamin E for now. Based on how much MSM remains, I expect to switch him over to the new supplement in another 2-3 weeks.
I think it will be good for them to have the additional joint support provided by the chondroitin and hyaluronic acid.
Purchasing the all-in-one is also slightly cheaper. :)