I recently had my gelding weighed, he came in at a whopping 1304 lbs, much to my surprise. I have always given him a full tube of whatever wormer was next in the rotation, but since most tubes are for a 1250lb max horse , do I need to give him some from another tube?
Welcome to my world. (My adult Percherons and Belgians get at least two tubes each.)
Since most OTC wormers are tested safe at several times the suggested dose, and under-dosing can lead to resistant parasites, I only split tubes in half. Over 1000-1200# (depending on the wormer) gets a tube and a half. Over a ton gets two tubes. Only have one flirting with needing 2 1/2 right now.