Sprayolo Ready to Use Livestock Marker, Blue, 1 Gallon   Agri-Pro 439725

This convenient, long-lasting marking paint allows you to mark animals from 3 to 5 feet away using the 32-oz trigger spray bottle included with every gallon of paint. A single pint marks 300 to 500 animals. Green and blue last about 5 days and are scourable on wool; pink lasts up to 10 days.