Equinety is 100% safe for any horse. There are no negative side effects when using Equinety Horse XL. As a matter of fact, we recommend not changing anything you’re giving to your horse and just add the Equinety Horse XL to your horse’s feed. Then over the next couple of weeks to 30 days, you should see enough of a noticeable change to then decide whether to reduce and/or stop giving other things you don’t believe are working to your expectations.