ShetlandPaul, there are two aromatheraphy oils that can safely be used neat, those are Lavender and tea tree, not risky at all, have used this as a tick remedy for years and have used it neat on myself and other people and countless animals. Studied and qualified in aromatheraphy and had my own business making remedies for people and animals so have a little idea of what will work
It is brilliant for removing ticks from dogs and natural too. Many uses for it and that is just one of them. And no its not toxic have used it to gargle which is pretty horrendous taste but gets rid of a bad sore throat.