Physical Challenges would be:-

Three Legged Animals – Amputees
Two Legged Animals – (Unilateral Double Amputees , Diagonal Double Amputees )
Two Legged Animals – ( Fore Limb Double Amputees )
Hind Limb Paralysis – (Unable to use both Hind Limbs)

Blind Animals
Totally Blind Animals
Blind by Birth
Loss of Vision in both eyes as a result of infection in early or juvenile stage
Loss of Vision in both eyes as a result of cruelty – sharp object pierced in both eyes
Loss of Vision in both eyes as a result of cataract in both eyes

Animals blind in one eye
Due to loss of one eye –injury or infection
Due to cataract in one eye

Deaf Animals
Deaf-Blind Animals
Spastic (Cerebellar Hypoplasia) Animals
Twisty (Radial Hypoplasia) Animals

Cat  or Dog with One  Eye 

Presence of One Eye imparting limited vision to a street animal

Sometimes due to injury to the eye,  an animal may lose one of its eyes. Injury could be as a result of cruelty or  due to accident. If such an animal is at home or in a confined safe environment, they remain free from dangers and learn to adapt in time, to vision through one eye.

However,  if an animal with one eye has to live a life on the street, adaptation is a significant issue in itself. Considering  the  busy streets of Mumbai, a complete vision is most essential  for the animal to move about confidentally on the street. Absence of an eye causes loss of lateral vision to that particular side and the animal may not be able to see any obstruction  or vehicle next to it, unless it is fairly close. The ear on that side of the eye would be able to sense noise and closeness of an object depending on the noise it has produced, yet crossing a busy street,  sensing the presence of objects close to that side of the body may become difficult thus making the animal accident prone

To then carefully visualise what is present on the side where there is no eye, the animal would have to actually rotate its head in a manner that the intact eye can completely see the other side or the animal may simply have to position its body in an appropriate angle to observe things around the area and side where the eye is missing.

A  Totally Blind Animal  - Absence of  Both Eyes in an Animal

As mentioned earlier, an animal could suffer from complete loss of vision either  as a defect by Birth, or lose both its eyes if the eyes have been pierced with a sharp object as a result of cruelty.  It is also likely, especially a common observation, small feral kittens contract eye infections and if they do not receive the right medication in time, the infection sometimes is a cause for loss of vision in the animal. This is also observed in pups.   Thus,  it becomes very vital that any eye infections in kittens, puppies or even the adult cat or dog should be treated in time with the appropriate medication under medical supervision,  to avoid loss of vision.

Having managed  blind cats in a cattery, I can say that there is no chance for a blind animal on the street and a blind animal most certainly deserves to be under special care and attention and live in a safe environment where it will be provided food, shelter as well as medication when unwell. In time, the blind animal will gradually learn how to manoeuvre itself  either in a home or in a shelter. Blind Animals kept as pets or in a particular shelter area, in time understand the placement of furniture and objects and it is important that as owners or shelter managers do not restructure the furniture often so as to keep the animal in comfort.

Blind animals become extremely cautious and careful whilst they move around and tread carefully. Their sense of hearing, touch and smell get magnified and they regularly find their way through the sense of touch by feeling objects.