Because of 4 confirmed cases of West Nile Virus in our area, the city will be spraying for mosquitoes using the chemical permethrin. The notice states that any vegetation grown for consumption can be safely eaten after washing well with water and food-safe soap; does anyone know if washing the grass will be effective and safe for Sheldon to eat? If not, how long will it be before I can feed it to him again? I filled 5 quart sized freezer bags today; I'm hoping it will stay fresh to get him through at least a week or so just in case. Any information or advice will be appreciated!