Because of the fast growth rate of duckweed, I’m considering it as a low-cost feed for rabbits. Is it good for rabbits?
Of course it is. To avoid diseases, wash and dry it a little before feeding it to rabbits. Don't dry on tarpauline or sack because it'll not dry well. Dry on a mesh - like mosquito net, but not the ones with insecticides! That way, water can easily drain off as it dries.
I think there is another one called azolla.