Is there a problem?

I was being advised by an experienced cat lover and a good friend on cat care. In the process I began reading the USPCA manual Caring for Cats & Kittens and was in for a nasty shock.

snowy - white cat - blue eyes

We had always noticed Snowy to be ignoring us when beckoned. Turns out that she is deaf! And through no fault of hers. Believe it or not it’s because she has white fur and blue eyes!

Not all blue-eyed white cats are deaf, but many of them are.

Here are the STATISTICS:

  • 95% of the general cat population is non-white cats (i.e. not pure white) and congenital deafness is extremely rare in non-white cats.
  • 5% of the general cat population is white cats (i.e. pure white).
  • 15-40% of these pure white cats have one or two blue-eyes.
  • Of those white cats with one or two blue eyes, 60-80% are deaf; 20-40% have normal hearing; 30-40% have one blue eye and are deaf while 60-70% have one blue eye and normal hearing.
  • Of the 5% of white cats in the overall population, 60-80% have eyes of other colors (e.g. orange, green). Of those 10- 20% are deaf and 80-90% had normal hearing.
  • Deaf white cats with one or two blue eyes account for 0.25 – 1.5 of total cat population
  • Total number of cats with white coat and blue eyes account for 0.75 – 2.0% of total cat population

And so, we are lucky to have the one in a thousand cat!

And here is the SCIENCE:

White cats with blue eyes often suffer from a genetic defect that causes their cochlea, a vital organ within the inner ear, to degenerate shortly after birth. This is because the stem cells for the melanocytes (pigment producing cells) and cochlea are the same. White cats with eyes of other colours can usually hear. As for odd-eyed white cats, when a white cat has one orange and one blue eye, the ear on the blue-eyed side is likely to be deaf, whereas the one on the orange-eyed side is usually fine.

Popular belief has it that such cats make bad mothers because they tend to ignore their cries of their young. However, deaf cats can be good mothers and good hunters. Many compensate for their disability by becoming exceptionally sensitive to sound vibrations, thus enabling them to hear with their paws. Vision and other senses may also be enhanced, giving the deaf cat an edge in some respects.

We only have to wait and watch!

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7 responses to “Is there a problem?

  1. What does their fur have to do with it? The colour I mean… white… Is that relevant?

    • It has to do with the common locus of the melanin gene and the one for the tapetum lucidum. The tapetum lucidum is generated from the same stem cells as melanocytes (pigment cells). The blue eyes in a piebald or epistatic white cat indicates a lack of tapetum. Deafness is caused by an absence of a cell layer in the inner ear that originates from the same stem cells as well.

  2. I love her. and I love the pic 🙂

  3. Cooolllll knowledge… a very beautiful page

  4. Oh.. i definately didn’t know about that.. very intresting Bro.. does any other animal have the same life cycle ???

  5. i diidnt know that befor but have one white cat and she can hear very well … she is very nice

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