A friend of mine who does a lot of aromatherapy passed on to me this recipe for keeping ticks off of your dogs. Caution do not use on cats!
Apparently ticks hate geranium, bay, and lavender. Here is an oil blend that can keep ticks off your dogs
20 ml base oil (e.g. olive oil, sweet almond oil, jojoba oil)
7 drops Lavender Essential Oil
5 drops Geranium Essential Oil
3 drops Bay Leaf Essential Oil
Mix together in a container and apply a few drops of the oil blend to the neck, back, chest, legs, and tail of your dog.
NOTE: Always test 1 drop of the oil you wish to use in your dog’s armpit to check for reactions before using.