My local store ran out of the 16% duck and goose pellets I usually feed my two laying girls so I was forced to buy a 20% duck and goose crumble. From reading other posts I am no longer too concerned about the higher protein. I give the two ducks about 2-3 cups of feed per day and most days there is a little left in the bowl. Since stating this new crumble, there is none left when I get home from work and when I go to lock them up at night they are acting crazily ravenous. Even my shy duck who rarely eats from my hand is running at me and pecking at me like crazy asking for food. I giving them the exact same volume of food - what is making them so hungry! I don't want them to be hungry but I don't want to overfeed them and end up with chubby ducks... Thoughts?