Bio-Groom Flea and Tick Shampoo features natural Pyrethrin and a protein-lanolin formula to give coats a healthy sheen. Safe for use with Proban. Mild formula is ideal for sensitive skin. Safe for puppies and kittens over 12 weeks old. Dilutes 4:1. Flea and Tick Shampoo is available in the sizes listed below. Can be diluted with no loss of flea and tick control.