Most horses don't experience issues with Metformin, but as with any medication, some will.
My mini is one of those - he stopped eating entirely as soon as I put him on Metformin and obviously felt lousy. As soon as I stopped the Metformin, his appetite returned and he was fine. Tried it a couple of times, with the same reaction each time. I was syringing it in with milk of magnesia.
Lavinia, George Too, Calvin (PPID) and Dinky (PPID/IR)
Nappi, George and Dante Over the Bridge
Jan 05, RI