More recent evidence proves that the major contribution to the smell of flatus comes from a combination of volatile sulphur compounds (vsc).[5][12] it is known that hydrogen sulphide (h2s), methyl mercaptan, mm (also known as methanethiol, mt), dimethyl sulphide (dms), dimethyl disulphide (dmds) and dimethyl trisulphide (dmts) are present and cause the smell.Those compounds are the one percent that cause the smell.
Symptoms include a whitening of the lens, which is a clear part of the eye needed for focussing, and the problem impairs sight and may even lead to blindness. The whitening or cloudiness is opaque and thus cannot be seen through. Inherited cataracts can occur at any age in the affected dog.
Like indicated above, there are different causes. When the watery eyes come with dog eye discharge, the cause could be dry eye. When a dog experiences it, there is less production of tears and the system tries to compensate by making more mucus to act as a lubricant. As a result, dog watery eyes with white discharge. Dog Watery Eyes and Sneezing or Runny Nose. It is possible for a dog with watery eyes to also show symptoms related to the respiratory system such as sneezing and a runny nose. When this happens, the cause could be an allergic reaction.