I guess I didn't read the description of this product carefully enough or I would not have ordered two small spray bottles that were quite expensive. The fleas this year in East Texas are horrendous, almost no winter so now hard frost kill. I'm a breeder so I have several house dogs. I couldn't wait for this to arrive. It says "kills on contact" and it does, I'll give it that. But it doesn't last and the next day just as many fleas are back. But that's not the problem. As soon as I sprayed it I realized that "lemongrass" is not the main ingredient; it is cedar oil! I went to the internet and my suspicions were correct. Cedar oil should NOT be used on pregnant dogs - and the container says it can be and newborn puppies as well. I used to use cedar shampoo - in fact, it was called Cedarcide, (and this product is called Wondercide...) but it was taken off the market years ago. I may use it sparingly on retired (spayed and neutered) dogs but not if they play with my actively breeding dogs - and certainly not on newborn puppies!