Weights vary in each breed. You may just want to get a current weight on your rabbits, then if they are overweight go for a weight slightly under their current weight and feed for that weight, according to the recommended amount on the package, or if they are skinny then get the current weight and increase a little to figure for an ideal weight. Feeding amounts for oxbow adult food is 1/8 cup for 1-3lb, 1/4-1/3 for 4-7lb, 1/3-1/2cup for 8-10lb. Feeding amounts can be so different depending on each rabbits metabolism, so start with the general recommended amount, then you may need to adjust that up or down, as you see how each rabbit maintains it's weight on the food. Netherland dwarfs weight is usually between 2-3 lbs, so 1/8 cup would be a good starting point. Holland lops are around 3-5 lbs, so 1/8 cup if around 3 lb, 1/4 cup if around 5 lb. Dutch are about the same weight as hollands. English spots are about 6-8 lb, so around a 1/3-1/2 cup. So even with recommended amounts it's not always exact. I have a 5lb Holland lop that puts on weight easily and she gets about an 1/8 cup a day. So you just have to find the amount that works for each rabbit.