You would have to dry it or drain it a bit, as you would be feeding it out by the
bucket to each rabbit. Serving it wet will make things go yucky before they can eat it all. I can throw in a 6 foot sun choke plant and its gone by morning.
I'll go grab some out my
pond and try it on them, I've never been able to grow
enough to satisfy the ducks. If they get loose and hop in a
pond, 4 or 5 can kill off the duckweed in 10 mins.
But I think if you heap it up onto a mesh and spread it out, it will drain enough to behave like fresh green pickings. I'm dying to do it with azolla but our weather grows too little too late, n like I said the ducks.