Most folks are using the interceptor they stockpiled last year when this all went down at Wyeth..... Some folks have tried something from Home Depot made by Bayer, I think it's for termites or maybe chiggers, but i do not know the success or failures of yhose attempts so you will have to research the efficacy and dosing and fall out. In the meantime I would suggest going thru your local yellow pages and seeing if u can find a local vet to sell you some.