Well, I'd check what vitamins are in it and then compare with brewer's yeast which is packed full of B vitamins (quick google search will tell you which ones because I don't remember!) so you're not feeding too much of any particular one.
ok this is whats in benevit but i only give her one scoop
Micronutrient requirements of the horse
Vitamins and minerals are sometimes referred to as micronutrients due to the small amounts that are required in the diet. However this does not reflect their importance. Vitamins and minerals are vital for normal function of the body and they play important roles in the body's metabolic processes, for example in the production of energy and the construction of healthy tissue. Vitamin and mineral deficiencies in the diet will lead to disturbed body function and eventually disease. However, it is not always possible to determine from looking at your horse or pony whether or not they are receiving adequate micronutrients. If symptoms are evident, disease is imminent.
Essential fatty acid deficiencies are as debilitating as micronutrient deficiencies and may cause skin problems and eventually, disturbed body function. The horse requires both linoleic acid, an omega-6 fatty acid and alpha-linolenic acid, an omega-3 fatty acid, therefore where dietary levels are unknown, supplementing will help to keep the horse feeling and looking good.
Nutrient Analysis
per 80g (2 scoops)
Vit A
187324 iu/kg
15000 iu
Vit D3
18732 iu/kg
1500 iu
Vit E
9366 mg/kg
750 mg
Calcium
12.5 %
10 g
Phosphorus
3.7 %
3 g
Magnesium
1.2 %
1 g
Potassium
0.6 %
0.5 g
Sodium
1.2 %
1 g
Chloride
2.5 %
2 g
Iron
1249 mg/kg
100 mg
Manganese
1249 mg/kg
100 mg
Iodine
5 mg/kg
0.4 mg
Cobalt
6 mg/kg
0.5 mg
Copper
937 mg/kg
75 mg
Zinc
2498 mg/kg
200 mg
Selenium
12 mg/kg
1 mg
Thiamine (B1)
250 mg/kg
20 mg
B2
187 mg/kg
15 mg
B6
125 mg/kg
10 mg
Niacin (B3)
125 mg/kg
10 mg
Panto. acid
172 mg/kg
13.8 mg
Folic acid
87 mg/kg
7 mg
Choline
932 mg/kg
74.6 mg
Biotin
12 mg/kg
1 mg
B12
2498 mcg/kg
200 mcg
Vitamin K
87 mg/kg
7 mg
Directions for use
Weight of Horse/Pony Approximate Height Maintenance/light work- amount per day Medium/hard work - amount per day
Up to 250kg/550lb Under 12hh ¾ scoop 1 ¼ scoops
250kg/550lb to 400kg/880lb 12 - 14hh 1 ½ scoops 2 scoops
400kg/880lb to 600kg/1320lb 14 - 16hh 2 scoops 3 scoops
Over 600kg/1320lb Over 16hh 2 ¾ scoops 4 scoops
1 level scoop of Benevit Advance weighs approximately 40g. Youngstock (weaning to 3 years) and pregnant mares during the last 3 months of gestation should be fed at the rates for medium/hard work according to bodyweight. Feed supplements should be fed according to bodyweight - height has been given as a guide. Introduce gradually, splitting between feeds (when applicable).
For further information about Benevit Advance or any other Feedmark product, or for any help with your horse or ponys ration simply consult a Feedmark nutritional adviser on the free helpline: 0800 585525 (UK), 1-800-462-8982 (US). Benevit Advance is a complementary feeding stuff for equine animals. Feedmark uses nothing in the formulation of this product that contravenes competition rules.
IF YOU ARE IN ANY DOUBT ABOUT YOUR HORSE OR PONY'S HEALTH OR CONDITION, A VETERINARY SURGEON SHOULD BE CONSULTED.
and this is whats in brewers yeast
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Major source of B complex vitamins including B1 (thiamine), B2 (riboflavin), B3 (niacin), and B9 (folic acid)
which help the body break down carbohydrates, fats and proteins
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Excellent source of bio available chromium which helps normal blood sugar levels
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Can reduce incidence of colic and ulcers by maintaining PH balance