Actual Weight isn't always a big deal. Condition is a better indicator of health. You should be able to feel the horses ribs without having to really push around on his sides. You don't want to see fatty deposits around the top of his tail or the front of his shoulders. You don't want to see a "groove" down his back (spine lower than his back).
Print out this body conditioning scale and take it with you when you go see him next. Try to use the indicators to figure out where your boy fits in. Ideally, you want your horse at a "5", no more than a "6". http://www.admani.com/allianceequine...ore%20Card.pdf http://extension.usu.edu/files/publi...ne_2005-01.pdf
- use the first and last page as your guide.