Dogs have tear stains mainly due to the following reasons. First, often eat food with a high salt content, thus stimulating the secretion of the tear glands and forming tear marks. In this case, the diet should be light. Secondly, narrowing of the nasolacrimal duct caused by breed problems, such as Bichon Frise, Poodle, Schnauzer, etc. Thirdly, disease causes, such as diseases of the ear, nose and throat, can also stimulate increased secretion of tears. This situation is recommended to take the dog to the hospital for examination and treatment.
