Cest Yellow Drops for Pigeons - Eliminates Fungi, Canker, & BacteriaA unique solution based on Acriflavine, which instantly eliminates fungi, canker, and bacteria in the crop and upper respiratory. Yellow Drops is a revolutionary product containing Acriflavine, a unique active ingredient proven to help eliminate even the most stubborn fungal, canker and bacterial infection. Yellow drops also help clear any dust or pollen present in the respiratory tract that may cause inflammation and allergies. Yellow drops are dark