Wow, new look! I hadn't been here in a while.
So, I'm having a battle with fleas here. I live on a farm in Costa Rica. It's very damp during the rainy season (now). We have two dogs. One of our cabins is infested. The lady living in it doesn't want it to be sprayed with carcinogenic crap, and I don't want the dogs' blood to be full of preventative chemicals, if I haven't seen a single flea on them for months.
She said some exterminators that came here last year and treated our place with that fungus that eats insects from the inside told her fleas don't need to live on dogs. They just feed for some time, but for the most part they make their nest in damp places. In our case it's all the cracks between the cabin walls and the porch floor, that are now canyons thanks to the many earthquakes we get.
This lady tried with DE and said it doesn't work. I don't know how she's applying it, but she does do a lot of internet researches. So far in this forum I read about feeding the dogs a teaspoon of ACV every day, as well as feeding them brewer's yeast, except we get it from the US for our salad and it's really expensive.
Can somebody please help with my situation? With dogs running out into the forest on some expedition every couple of weeks, they are bound to bring home some parassite or other. Also, with those cracks around the cabin, it's like having an empty hotel for fleas. Any help is welcome.