Collie-nose generally occurs in dogs with little or no pigment in their nose and is not restricted to Collies. Super-sensitive dogs to sunlight develop lesions on the nose and occasionally around the eyelids, ranging from light pink to ulcerating lesions. The condition may be challenging to diagnose at first because many other diseases can cause the same lesions. If your dog is diagnosed with Collie nose, keep them out of direct sunlight, and apply doggie sunscreen when they go outside. The most effective way to manage Collie-nose is to tattoo the dog’s nose black because the ink serves as a shield against sunlight.