Currently, most authentic Chausies produced are late generation cats with fully domestic temperaments. Their TICA registration certificates will usually indicate that they are "C" generation or "SBT," which nearly always means they are four generations or more beyond the jungle cat (F. chaus). In cases where they are "A" or "B" generation, it is usually because they have been recently outcrossed to another domestic breed to improve specific cosmetic traits, but the cats are nonetheless more than four generations beyond the handful of nondomestic ancestors.
According to a report in a 1978 edition of the British tabloid paper “Sun”, a “pantig” (panther-tiger hybrid) was born at Southam Zoo, a private zoo located on Warwickshire farm (Southam is between Royal Leamington Spa and Daventry). The purported pantig was the result of a mating between a male black leopard and a tigress and was fostered by a Dachshund. The cub’s background colour was the typical yellow-brown shade of normal leopards. Unlike earlier attempts at captive-breeding leopard-tiger hybrids, this purported hybrid evidently survived into adulthood. Eventually, the Southam Zoo pantig was sold to an American zoo. Although this account is currently not scientifically authenticated, it indicates that the leopard’s recessive melanism gene is also recessive to the tiger’s normal tawny color.
Big cats spawn on grass blocks at light levels of 9 or more in groups of up to 4. Some cats only spawn in certain biomes: leopards spawn in jungles, forests and forest variants; lions, panthers and tigers spawn in plains and forests; and snow leopards spawn in cold biomes. Lions and tigers also spawn more frequently than panthers. There is a 1/20 chance for a white lion, white lioness or white tiger to spawn.
For as long as I can remember my 5 year old cat has intermittent rapid breathing. She doesn't seem bothered by this and she doesn't have any other symptoms when she is breathing quickly. I always forget to ask about this when she is at the vet and her breathing is always normal there. When her breathing is fast it's around 70 75 breaths per minute and normal is around 32. The intermittent fast breathing last maybe a few minutes and then goes back to normal.
Little is known about the origin of the Russian Blue breed, though stories are legendary. Many believe the Russian Blue is a natural breed originating from the Archangel Isles in northern Russia, where the long winters developed a cat with a dense, plush coat. Rumors also abound that the Russian Blue breed descended from the cats kept by the Russian Czars. Assuming the Russian Blue did migrate from northern Russia, it was likely via ship to England and northern Europe in the mid 1860s.
Pulmonary edema is the buildup of fluid in the within these air sacs leading to shortness of breath. Located in the lungs are thousands of air sacs (alveoli) which are small balloon-like structures where the exchange of carbon dioxide and oxygen occurs. Tiny capillaries surround the alveoli on the outside. When the cat breathes in, air enters the lungs, causing the alveoli to expand. Oxygen passes from the alveoli and into the capillaries, carbon dioxide from the capillaries pass into the alveoli and is exhaled out. The most common causes of pulmonary edema relate to problems with the heart, such as hypertrophic cardiomyopathy.  Heart diseases can lead to reduced movement of blood through the capillaries in the lungs. As the blood flow slows, fluid leaks out of the vessels into the airways. [1]
Rapid breathing (tachypnea) is a respiratory disorder characterised by abnormal breathing that is rapid and shallow.  It is caused by a reduced level of oxygen, mechanical disorders (where the lungs aren’t able to expand as they should, usually due to a build-up of fluid in or around the lungs), and physiological disorders in which the cat’s respiratory centre in the brain is over stimulated.
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