1. If the dog is a puppy, you need to rule out any other symptoms. 2. Check the eyes for parasites, nematodes, conjunctival redness, conjunctivitis, corneal ulcers, if the disease is bilateral and has a long duration, whether there is a blockage of the nasolacrimal ducts (more frequent in Bichons and VIPs), whether there are inverted eyelashes (more frequent in short-nosed dogs such as pit bulls). Also diet can affect, pay attention to scientific feeding, etc. 3. If it is an older dog, you need to exclude whether there is a reduction in the amount of tears, glaucoma, etc.
