We had a thourghbred  that got skinny very easily .  Speedybeet is a good feed it fattens them up. Also you have to soack it for about 10 min. it sweals up 4 times the size. So a bag would last you for quite a few months. Try it . Our horse put on quite a lot of weight.

My thorough breds the same, im building him up now..

im giving him baileys conditioning cubes and alfa a chaff in the morning, and then at night i feed him a good 3 scoops of ready mash extra and a little bit of vegetable or corn oil :)

hope it helps:)

Heyyaaa

i have a two TBs and both suffer from weight loss.

my guys have 2 feeds aday in the winter one before they get turned out and one when they come in this includes.

1 scocop of sugerbeet 1scoop of chalf and 1 and half of not heated highlight mix (as they cant go on anything else as they go mad!)

i would also suggest you feed looks of hay if you dont have grass in your paddock.

i would personaltly suggest 3/4 of a bale a day, this is what mine get a day and they look fine and well

hope this helps