I had a nutritionist recommended a feed for my baby ducks (started at 1 week old and they are now 4 weeks still on same bag of food) it is a 24% protein and everywhere I read said they should be at a lower level? He then told me to go to the next feed down after I feed this bag out and that is a 19%. Is this to much protein? Will it hurt them? I still have half a bag left of the 24%.