I am switching- one "house" at a time-to sand. I use a cat litter scoop.It takes about 20 minutes in each in the 3 places I have switched to sand.I tried to move some babies and moms to the sand- THe building htey are in had 2 big pens inside and I had cleaned and switched the one side to sand and moved the other occupants- 2 moms and 14 babies over while I cleaned their side. I decided to put them back on shavings for a bit longer.The babies chowed down the whole time they were on the sand. That is why I decided to keep them on shavings a while longer. I used what the folks at the mulch yard called "river sand"The man there said it would probably do best for what I wanted it for. Next time I go- I am getting "decorative stone" for the duck pen.I got mine in 5 gallon buckets in the back of my minivan.By the scoop ina truck would be cheaper- but getting my husband to go get it is the hard part.