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Progressive retinal atrophy (PRA) is a group of genetic diseases seen in certain breeds of dogs and, more rarely, cats. Similar to retinitis pigmentosa in humans, [1] it is characterized by the bilateral degeneration of the retina, causing progressive vision loss culminating in blindness.
Cats will adjust their eyes during the day, allowing less light to filter in, while their pupils will expand at night to allow for more light, Purina reports. Feline eyes also have more "rods ...
A rare predominantly black cat with odd eyes. The odd-eyed colouring is caused when either the epistatic (recessive) white gene or dominant white (which masks any other colour genes and turns a cat completely solid white) [3] or the white spotting gene (which is the gene responsible for bicolour coats) [4] prevents melanin granules from reaching one eye during development, resulting in a cat ...
However, white cats with blue eyes do have slightly higher probability of genetic deafness than white cats of other eye colors. [15] White cats having one blue and one other-colored eye are called "odd-eyed" and may be deaf on the same side as the blue eye. [16] This is the result of the yellow iris pigmentation rising to the surface of only ...
Because of cats’ territorial instincts, it can often be a challenge to introduce other pets, or even people into a cat’s household. Family’s need to be slow and patient when bring a new cat ...
More than half of cats sleep between 12 and 18 hours a day, sometimes even more. Most cats sleep more as they age. [27] An alert cat at night, with pupils dilated and ears directed at a sound. Domestic cats seem to be comparatively flexible with regard to the times of day and night they are active or asleep. [28]
Things like the Feliway for cats or Adaptil for dogs can be a good choice as these mimic familiar calming pheromones that can help pets feel more relaxed and at ease. 13. Supervise their interactions
Clinical signs and disease progression vary markedly among individual animals, depending on the number and type of hormones that are increased, the degree of hormone elevation, and the age of the dog. [5] Some owners notice a more obvious "eye shine" in photographs due to the dilated pupils and retinal atrophy creating what is described as a ...