Anyone heard of this? I read on a couple other forums about using Borax to kill fleas...sprinkle into carpet and some people put on their dogs? Think it's safe to put on the dog?

I have 2 boxers and have been fighting off fleas now for 2 weeks...luckily I only find a few each day with combing because of the Frontline Plus but I need to get rid of them ASAP, creeping me out