White Vinegar and Eucalyptus Oil are both useful in killing fleas. You can use the Vinegar mixed with water as a flea rinse for your dog if you have one. You can use the Eucalyptus oil on yourself using a cotton ball or tissue to wipe it on. Both are safe for your birds. You can also make a rinse or spray with water and the Eucalyptus Oil by using an emulsifying agent like lemon juice. Oil and water do not normally combine but by adding a small amount of lemon juice you can get the oil and water to combine. Milk is also an emulsifier but it is not that good for using in a rinse or spray.