Originally Posted by deserthorsewoman
LHP, the omega horseshine is 4 oz per cup. I weighed it because of blimp problems
A lb of Timothy hay has 2.5% fat
When offered in a slowfeeder net, the average QH eats about 16-18 lbs of hay daily. I also, just like Oldhorselady, noticed that they eat less hay, voluntarily, when eating out of such net( mine went from 25 to 15 lbs hay).
So let's say horse eats 2% of it's bodyweight.
1000lb horse eats 20 lbs of feed.
15 of the 20 lbs is hay.
So hay supplies 0.375 lbs of fat/day
Now all the other supplements can be added.
I find the math much easier when I transfer everything in grams and kilos, it's dezimal....for me anyway. 1 lb = 450 grams, or 0.45 kg
Did I confuse everybody enough?
You're confusing people by incorporating the fat content of the hay into the calculation of the magic 1# of fat. The goal here isn't one pound of fat, it's the 20-25% of calories coming from fat.
The OP states that her horse is a hard keeper. He probably eats more than his share of hay. Let's say he eats 30# of hay per day (not unreasonable).
30# of hay is going to provide .75# of fat. If I only need to meet the 1# goal, than 1/2 C of oil will provide that additional .25#. Now what % of the calories comes from fat?
Grass hay has approximately .9 Mcals/#. 30# of hay will provide 27 Mcals. 3 Mcals are coming from the .75# of fat.
Oil has 4 Mcals/# (2C). 1/2C is going to provide 1 Mcal.
So the horse is getting 28 Mcals per day and 4 Mcals are fat calories.
The % of his calories that come from fat: 4 divided by 28 is 14.3%. Not nearly enough to meet the goals of the diet.
If I carried this out all the way, I can meet the 1# goal with 40# of hay only problem is only 11% of the calories will come from fat.
Now if we look at OHL's diet with the 1# of fat in addition to the hay:
20# hay and pellets is going to have .5# fat and 18 Mcals
OM will have 2 oz fat and .63 Mcals
CC100 6 oz fat and 1.32 Mcal
Senior 1 oz fat and .75 Mcal
Oil .5# fat and 2 Mcals
So in this diet, she is receiving 22.7 Mcals, 1.55# of fat (6.2 Mcal)
% of fat in the diet is 27%. It is on the high side but she's seeing results than she's on the right track. If she dropped her fat intake to the 1# but keep the same Mcals to maintain condition, her % would drop to 17.6%. If any horse consumed more than 20 Mcals/day, they will automatically fall below the desired 20+% if they only get one pound of fat in the diet.
Simplify the calculations, throw out the 2.5% of fat in the hay, and try to meet the 1# of additional fat with high fat options. The extra fat that the hay contributes is not going to be of detriment but if you are relying on it to be part of the overall fat intake, it can easily pull that percentage down as the hay portion increases.