Opinion on Seminole Horse feeds

[Classybarrels]

Im looking to change my feed for my horse Ace he has bad anxiety and gets stressed easily my friend recommended Seminole Calm & Cool And Equalizer
What do you think
What is your opinion on this type of feed

 

[ycbm]

Is it available in the UK? I'm not sure you will get many answers because I cant find it for sale in the UK, where most members are from. Better on chronofhorse.com, a US forum, maybe?