Recommend a calmer supplement for horse on box rest

Im having great sucess with v calm by James Hart (horse health sell it) It does smell quite strong so I did have to introduce it gradually as it was 'rejected' at first but now gets gobbled up :)
 
Topspec calmer worked really well for my daughters horse who hated being stabled and got really stressed if in but had to be box rested for 3 months. He was really chilled out whilst on it :)
 
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