depends on the scoop used a big round double scoop depending of type of feed
can hold if cubes 2 3/4lbs if mix 3- 3 1/2 - 3 3 1/4lbs
rather than guess as your so far out you should buy a weight tape
you measure the lenght of the horse from chest to tail
then from wither to heart -to you its just behind the elbow of the horse
and calculate his bodyweight and feed him accordingly with his work
you feed your horse according to weight and work
which should be 20% feed and 80% roughage ie hay and grass of its bodyweight
so for exsample a 15,2hh horse in medium work would have 30lb of food
so thats divided 25lb in hay and 5lb in feed
if hes a good do er it would be less if hes in full time work it work be slightly more feed
as the horse needs calories then its the hay thats going to put it on the same to with grass being out 2hours isnt enough if you have good grass then put him out there for longer
if feeding hay make sure its good quality an average 15,2h horse weighing in at at 500-600kg
your horse is 1600lb which is 725kg
in moderate work, your horse need to be out more and up the hay and less grain as his guts tiny due to him being underweight
i would worm the horse to 725kg on the worming tube and then re worm in 2weeks time then put him on a worming programme to seasons of the year and cycle of the worms which would be four times year
also - do not over feed as the horses gut is tiny and will cause colic as someone rightly said if your over feeding your horse via grian or feed or mix
when feeding you want a low energy and more calories i surgest you learn about different types of feed and grain and what each one does i also surgest you read the back of each packet so your not overlaoding your horse with one thing or another and surgest you read and do the same with any type of supplement
all you really need to do if you feed good quality hay add veggie oil to his diet of feed as this is slow releasing energy good for coat and joints and you wont need any other supplement
with good hay you can up the calories easily the same as one can if they put the horse out on good grass which you said you have so get her out there more so during ther day as 2hrs isnt enough
a single scoop is 1 lb or 1 1/2 lb in weight depending if nuts or mixs
nuts are pellets to you
please remember that striaght feeds like oats barley maize in any scoop weight differently same as mix or pellets in any scoop why
because some are small and some are big - if oats the you will get more in the scoop than pellets ok
and i will add this as i also resuce horses and ponies
and want to make it clear to you - you do not work any horses or ponies when they are underwieght
1- is deemed as abusive
2- what weight your trying to put on your running off and the horse look the same or worse
3- you build the horse up once its up to weight you slowly re introduce work
4- you do not shove it straight in a carriage and expect to work all as you have done
5- the horse once up to weight and or is under weight is unfit
6- you work the horse via long reining and treat it as you would an un borken horse - which means you start of for 15mins and slowly work the horse up to an hours work working on both sides of the rein left and right side
7- you do not feed it straight away after its been
8- you do not feed it just before its going to work
9- you wait about an hour after work before feeding and you feed about 2hrs before working the horse
10- thus gives the horse time to diegest his food before work
and after working gives him time to come down as in let down
once fed leave him peace to enjoy his dinner and resepct his/her space of the stable
one human being wouldnt want ro run 10miles then be expected to eat his food right off as it would cause belly ache its the same for the horse
consider and respect the horse thats working for you as in the pic with the fares you earn on the white red festival when the horse was underweight
you want this horse to last and work for you then you give it the respect and he/she shall respect you back