Just want to chime in about Smartpak's customer service. They are amazing. Literally every time I call them for something, I hang up wishing every company was like them. They also call to followup on any changes made in Paks.
I use Smartcalm Ultra too, and have had good results. My horse is still spunky and energetic, but he is just soooo much more willing to listen and behave himself. But no, it won't completely change your horse's personality. No experience with the tendon Paks, but want to add that in my experience, pellets are a lot easier to feed and be sure your horse got the dose than powder. My horse always snorts at his food before he eats it. Poof goes the powder Posted via Mobile Device