My farrier thinks my horse's hoof walls are a little thin or weak. Are they any cost friendly supplements you recommend? I have never used a hoof supplement before. 

If you can find it I've never used anything better than Equine Relevare Hoof Dressing.

Sho-Hoof by Manna Pro is very affordable and has worked wonders on my mare with brittle hooves!

GLC Hoof and Bone. I had fabulous results on a broodmare that needed it.

https://www.grazingbitperformancehorses.com/product-page/glc-hoof-and-bone

By far the best hoof supplement I use is a mineral supplement called Horse Glow made by a feed company in Hereford, Texas. Their hooves are crack free and my horse actually has thicker soles. 

OE Nutraceuticals hoof evulution. Great stuff. My horse is proof of it & no I don't sell it. 

My farrier said my horse's feet looked so much better and asked what was different. I have been feeding TRI AMINO by Ukulele. Wasn't really feeding it for hooves. 

Curicyn n hoof care kit it really help with healing your horse you can get it at Curicyn.com and use my code PW20 to get 20%!

Equinity XL by far! 

California trace minerals will  have everything that you need for healthy hooves,ligaments and bone. If your feeding anything with iron in it or water high in iron. Your beating your head on the wall. As iron blocks the needed nutrients necessary for hoof health. It may look costly but it's not. They also have a cheater mix of copper and zinc that will work. If you need a place to start.