My horse is on it as an experiment to see if she is insulin resistant (magnesium helps them lose weight). Two weeks on - she's still fat and still nutty
my mare is on magnitude . she was on magic with good effect, but decided to try magnitude due to price . it has worked for her, just takes the edge off her.......... she used to hate being brushed, girth done up etc, and fidgety. now will stand like a lamb, and not so mood and tetchy. she is still lively to ride at times, but calmer than before.
definately worth a try as its cheap enough, and lasts a long time.
Guess whether it works will depend if your grazing is low in magnesium. I tried it on my yearling filly when she started acting liking a lune, my husband swore it helped (he was handling her at the time). I've now switched her to Bailey's Stud Balancer and have stopped using the Magnitude - and filly is being good as gold still.
If you need a magnesium supplement, this one is certainly the best value for money.