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.
Glaucoma can be primary or secondary to another eye disease that is causing a problem with drainage of fluid from inside the eye. Primary glaucoma is rare in cats and common in dogs. Secondary glaucoma in cats is almost always the result of chronic inflammation of the eye (uveitis). Glaucoma in pets is thought to cause pain similar to a headache, and probably migraine-level pain.