depend on time of year. Right now with the over abundance of young ducks that I have and the reduced forage I have for them after this dry spring, I'm probably going through a 50 lb bag of layer pellets a week and probably 10 lb of scratch. At the moment I have 4 adult females and one big drake. There are 7 laying hens, 4 full grown "babies" of about 5 months old, 7 3 1/2 month old "babies" starting to fly, 14 1 1/2 month old little piggy ducks that will eat everything in site and squirrles raiding the scratch feeder which is why I don't refill it very often otherwise I would be going through 50 lb of scratch a week too.
Certain times a year they don't seem to need as much commercial feed because I have lots more greens from the garden to throw to them but the cool weather crops are running out here now and I didn't get much of my normal hot garden going very well this spring.