How can you tell if a horse has been drugged, and do their eyes dilate?

You should be suspicious if the horse seems too dead quiet like it's eyes are glazed over, they aren't moving much, their ears aren't moving and they aren't really aware of what is going around them. Also look for small indentions along their neck because it's common to inject drugs there. But many sellers know what they are doing so they do just enough to take the edge off but not enough for them to show any signs. My advice would be if you are looking for a horse to buy, buy from someone your trainer trust, or reputable people that won't drug horses for viewing. The only way to know for sure is a blood test from the vet, but even then you would have to know what drug it is to test for that specific drug and it's also expensive. Hope this helps:)
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