Kitten sleeping after flea spray?!?

The info on the age the medicine states is there for a purpose. You don't spray or put flea sprays on 6 wk. old kittens. It is toxic and could kill the kitten. Why did you wait so long to do anything about it? Rush it to the Vet ASAP, before he dies. For flea problems, always get something from your Vet, only.