Almost all of the feed companies over here do their own range of balancers and they have become increasingly popular over the last 15/20 years. The majority of horses are not worked very hard, and with the number of natives, cobs, heavies and now WBs who are very good doers, kept on agricultural land which is often seeded with grasses more suitable to raising dairy cows, there are SO MANY fat horses! Most of the feed companies own nutritionists will now recommend balancer + chaff + speedi-beet/pink mash to almost every horse on a yard.
Spillers, Dodson & Horrell, Dengie are probably the 3 most commonly used feed companies here and all have a whole range of different balancers. Blue Chip had one of the original balancers and now do a range of concentrated balancers, but I had a bad experience with them years ago and their customer service was terrible. Then there’s a whole array of pelleted vitamin/mineral supplements which are also sold as balancers, made by the likes of NAF, Feedmark, Global Herbs, Thunderbrooks etc, but many of these don’t contain anything approaching NRC guidelines.