I wish I had good luck with DE and fleas (and ants) but it just didnt seem to work for me.
But in the Deep South we make fleas in numbers uncountable so even if the DE is reducing the numbers ten thousand dead fleas just wont show up in a population of millions. Am fighting the usual summer fight :evil: and vacuuming three times a day - both dogs and the cat are treated but nothing seems to work longer than two weeks - but the numbers are still insanely high.
My new best sound - it USE to be a slug going up a vacuum hose - is a bag tied tightly and full of the contents of the vacuum cleaner. The fleas inside sound like rice crispies as they hit the plastic trying to find a way out. :twisted:
All wire cages are GREAT to keep fleas off the buns though. After a flea feeds or needs to lay eggs it get OFF the host animal to either hide or lay eggs. If your cages are above flea jump height they can't get back onto the rabbit.
If you put DE in the nest box be sure to put it deep down so the kits cant breath it, its bad for lungs.
DE does do one super job for me down here though, it is GREAT for killing barn fly larvae!!! I need to get some more for the pig pen. The silly pigs have found and eaten all the solder fly larva in their pen so the barn flies have moved in. The SF larvae eat the barn fly maggots so the pig pen is the only place we have a problem this year.
The only time I had fleas on rabbits was when I had a large walk in pen for a grow out area. THOSE buns had fleas so I stopped using that cage entirely for rabbits and used it for quail instead.