We are going on vacation for 10 days and we will need to keep our Geese/gosling, Ducks/ducklings contained in an outside pen during that time. I was thinking about putting a bale of Alfalfa in the run to keep them busy during this time. Can too much alfalfa be harmful? My boyfriends 22 yr old college city kid will be taking care of things, but beyond water, feed and collecting eggs, he really won't be doing much more than that. That's why I'll need to keep them locked up while were gone. What's been your experience with providing alfalfa? Thanks!