LOVE SMARTPAKS!! They offer a large variety and reviews on all their stuff as well as the contents of each supplement are there to read. I have used a variety of their products, and probably spend far too much now that Im up to 4 horses but its been worth it. I have a easy keeper so he can't eat alot of grain, and his supplements ensure that he stays healthy. I have my mare on their Smart MSM which really helped her past hock injury which showed stiffness especially in the winter time. Since a recent move and the fact the prior owners at our new place were not big on fly/manure control...I put them all on the smart bugoff, and its wonderful. Between the fly predators I got started at our new place and the bug off my horses are doing so much better, and flies are down by more than half. It will be even better next year since it will take me that long to get everything as I like it. I also had my mare on smart hoof when she foundered 2 years ago, it did amazing things for her hoof growth (along with my vet and farrier) and she has totally recovered. I've also tried the smartomega 3 from smartpak, had my two geldings on that until I switched to the bugoff which already has omegas in it. And smartpaks customer service is exceptional. If a supplement didnt work they were more than happy to refund my money and help me find something else. I would even get phone calls afterwards to see how that paticular horse was doing. I know when my neighbors mare passed (per my recommendation he had her on a smartpak) and he called to cancel, they refunded his last order he received and sent him a sympathy card. Also if you pay attention, they are always sending coupons you can apply towards your smartpaks. I also have started ordering my wormer thru them since shipping is free with my smartpaks, so I just add it to my order every other month. I have found they are just as cheap, if not cheaper as going to my local feed store or TSC.