I feel the same way about commercial tick and flea preventatives. I am so nervous that my little girl will find a way to ingest it and make herself sick. So, I went on a search for a natural alternative and found the greates tick and flea preventative right in my pantry. Almost everyone has it, I can guarantee it! Plain White Vinegar... Give your baby a bath and then rinse down with vinegar. Over the course of the next few days just wipe your baby down with a cloth drenched in vinegar. If you are worried about the smell it goes away after an hour or two. Just be sure to do it in the tub, fleas and ticks will literally be jumping to their death. It makes them almost appear drunk. It's kind of funny actually. I only had to do it three times and they were gone. You can also add a tablespoon of vinegar to four cups of water to be used for drinking. It just adds to the process.
Trevor