I have 4 duckling about 2 1/2 weeks old. 3 are Pekin, 1 is a Runner. I work at a local hardware store and am looking into ordering a water fowl starter. The only thing is that it is a 28% feed. Description states it is for all water fowl but everything I read says they should be on 18% feed/starter.... Is 28% to high?? It is a 25lb bag so it would last me awhile but I would hate to buy it if they cant have it for very long if at all. Right now I am using a started/grower that the store was using but I would like to get them on a better quality food more suited for them.