Weight gain for young thoroughbreds

Give me some ideas:

I have a 3 (coming 4) TB filly out of Bar. Genetically, they run very light until a more mature age, so she's looking fairly normal, but I would like to see some significant weight gain (50 lbs for starters, eventually 75-100) before we start showing in the spring. She's currently consuming 6lbs a day of Legends Growth with 1.5 pounds rice bran pellets added. She's on straight alfalfa hay with a little bit of grass mix on the side (timothy, brome). I'm looking to take her off of Legends and put her on a mix i got from a hunter barn, then add the extras I want to it. My mix (per 1000lbs) is:
177lb corn
649lb oats
47lb molasses
118lb 41% bean meal
6.5lb lime.

What should I be adding to this? Vegetable oil? Beet pulp? Rice bran? Other? Again, going for healthy weight gain on a young hunter here.

Lime? as in the chemical or the fruit?

how much hay does she get? personally i would never put a horse on straight alfalfa alone, unless it was a mixed bale (alfalfa and timothy) or something like that.
talk to your vet.
At 4 I wouldnt be feeding the same way I fed a horse as a yearling or 2 year old, they were growing significantly.
Post pictures if possible. How much does she weigh now?
I dont like feeding anything with molasses, its empty calories you could instead be using to give her nutrient rich calories. Unless your horse is a picky eater molasses isnt necessary. I only like feeding something like rice bran or flax a s a top coat, not a significant part of the diet. I think rice bran is pretty fatty.

pollard is good for weight gain.... and i dunno if u can get it where u are in the world but we used weet-bix they sold a feed version of it in upper NSW australia

Wheat Pollard - is a by-product of the wheat milling industry. The energy level of pollard is approximately equal to that of oats.

It is extremely heating and as a bi product of wheat - not good to feed to horses. Was a favourite in the past to feed to show horses to increase condition. It lays down fat around the internal organs and is generally not a good feed for horses.

Pollard is bad for the horse - it is very high in phosphorous and contains pytates that prevent calcium absorption. It is also very hard on the horses kidneys. It also can excite them to a silly

It stops calcuim absorbsion

i've never had a problem with pollard being excitable??? i do realise if used in excess it can cause those problems, and i don't use it continuously only for initial weight gain- once you've got it on its not hard to keep on with the regular feed. Do u guys in the US have weetbix??? also bread is very fattening and the yeast goves a horses coat a metallic shine

im in New Zealand =P

pollard stops the absorbtion of calcium, not what you want with a young, or old horse. you cant see the effects till a horse breaks a bone. its like giving your horse osteoporosis.
it is also more of a filler.

yes of course we have weetbix haha, i'm eating it as we speak lol.

For fattening I would feed a beetpulp (sugarbeet) there really is hardly any sugar, it is the left overs AFTER sugar expulsion.
also add a oil to the horses feed, work up to 1/2-2/3 of a cup a day.
and a concentrate I feed my horse NRM lowGIsport - LowGIsport . Horse Sport/Leisure . NRM

I agree. I give Beet pulp to all my horses (some more than others) dependent upon their needs. But it adds weight, with out adding alot of carbs to their diet...its high concentration of carbohydrates that will cause a horse to become "hot"....so adding beet pulp will add bulk w/out the added sugar (sugar=carbs). The oil as well is a good way to introduce fat, and it will also help with a health coat.

My horses all get
1/2 cup Beet pulp
1 1/2 cup cool command pellets (lower starch than reg complete feed)
1 cup oil
flax
1 cup bran
a variation of pro/pebiotics

Now the ones that need more weight get a larger portion of Beetpulp and oil. So for example My 26 yr old TB mare, who is a very hard keeper, will get 2 1/2 cups Beet pulp, and 2 cups oil, along with the regular amount of feed/supplements.

Also increasing hay intake is helpful. Alfalfa hay is high in protein, so you don't want to increase any alfalfa intake...add more grass hay to the diet.

I also don't understand your evaluation regarding what you feed? 177 lb of corn???? that is a shit load of corn? Corn is hard for horses to digest, as is barley...I steer clear of those types of feed. The odd corn additive here and there but 177lb of corn???? lb is pounds...please tell me you meant something else?
Or do you make up a large batch...and then feed a specific amount that way? Just trying to fig out what you meant.

Ok...re-read your post...you obviously make a large batch of feed, and then feed specific amounts from there...as there is no way any horse could consume all that feed...
Sorry, had a blond moment there

LOL not u kiwis i know u guys have it i meant the Americans

yes i use speedibeet GAH *hits head on desk* next time i shouldn't post so late at night

lol, well It could have been me haha, it was 5.30am when I wrote it.