Pinkeye is most often a late-summer problem, generally caused bybacteria from flies or insects entering the eye of calf or adult. Thebacteria melt the surface of the eye causing an ulcer to develop. Earlyidentification and treatment is the key to control of this painfuldisease. After treatment with antibiotic or other topical remedy(consult your veterinarian), the pinkeye patch can be applied to protectthe eye and aid recovery. The patch will fall off naturally in about 10days. Our patches are Shut-Eye brand from USA. The Shut-Eye size allowssome natural movement of the eyelid. Each pack of 10 patches includesglue and instructions for use.