How accurate are they? My friend weight taped my 3 horses to see about where they are, and about how much weight they need to gain. Bo, quarter horse/arabian cross (best guess) taped at 878. Queen, TB, 1132. Kita taped at 1117. She didn't think that was right, so she moved the tape behind the withers. That time she taped 1065. I know they are underweight, but I am not sure about how much more they need to gain.