I have been considering switching the floor of my duck run from straw to sand.
You can clean sand so in the long run I would save money compared to my current deep litter method that I started doing when I had chickens that doesn't really work as well with ducks.
I am worried however because at the moment I have got 10 two week old ducklings and like most baby creatures they like to put things in their mouths and am concerned they may eat too much sand (I heard a horror story somewhere on the net)
Anyone got any experience with this? Would they be fine with the transition?