Hi there! What does the vet say? Three years seems like a long time for a dog to be losing hair without knowing why... Hair loss could be related to disease, problems with nutrition, or hormone imbalance (especially if the dog is a female). If your dog is exposed to fertilizer, then yes, it could be the culprit. Please go to the vet, if you haven't already! If the vet is stumped, try a second opinion.
Good luck!

Katie answered on 1/25/09. Helpful? / 0