Recommended daily dosages of vitamins and minerals for a 20 lb dog.These are not RDA amounts but dosages recommended for optimal health. 

 

VITAMIN/MINERAL	FOR 20 LB DOG	FOR 60 LB DOG
A	1500 IU	4500 IU
D	50 mg	150 mg
E	100 IU	300 IU
K	50 mcg	150 mcg
B1, Thiamine	5 mg	15 mg
B2, Riboflavin	5 mg	15 mg
B3, niacin	5 mg	15 mg
B5, Pantothenic acid	5 mg	15 mg
B6, prridoxine	5 mg	15 mg
PABA	5 mg	15 mg
Choline	100 mg	300 mg
Inositol	50 mg	150 mg
B12, Cobalamin	10 mcg	30 mcg
Biotin	60 mcg	180 mcg
Folic acid	80 mcg	240 mcg
B15, Pangamic acid	50 mg	150 mg
Ascorbic acid (Vit C)	500 mg	1500 mg
Bioflavanoids	100 mg	300 mg
Calcium	30 mg	90 mg
Phosphorus	20 mg	60 mg
Potassium	80 mg	240 mg
Magnesium	30 mg	90 mg
Molybdenum	30 mcg	90 mcg
Iron	15 mg	45 mg
Zinc	5 mg	15 mg
Copper	0.3 mg	0.9 mg
Iodine	30 mcg	90 mcg
Selenium	30 mcg	90 mcg
Manganese	1.5 mg	4.5 mg
Chromium	30 mcg	90 mcg
Sulfur	250 mg	750 mg