[brezofleur]

I use an ACV shampoo that REALLY helps with Zeus' flea allergy:
-1 cup liquid soap (can be natural...but I use blue Dawn to help fight fleas)
-1 cup apple cider vinegar (Mother's/natural)
-1 quart water

I know that some people use glycerin (1/3 cup, I think) but I haven't added it.