Up to 15 lbs. – ¼ – 1 cup* 16 to 25 lbs. – 1 – 1 ½ cups* 26 to 40 lbs. – 1 ½ – 2 ¼ cups* 41 to 60 lbs. – 2 ¼ – 3¼ cups* 61 to 80 lbs. – 3¼ – 4 cups* 81 to 100 lbs. – 4 – 4 ½ cups* Over 100 lbs. – Feed