The formulation is fixed and the vitamans and minerals are chelated.
I also only supplement now with KER Flex for the old guy.
The Performance feed is 20-20 and 1649 calories per pound
The Daily is 12-22 and 1835 calories per pound.
I did't include the price of the joint supplement to the daily costs of feeding it's just for one horse.
If you need to put weight on it's a great feed to top dress or feed alone. If you want a great coat it will definetly make them shine.