Tri-color Cats: Because of the associated genetic factors that create their color patterns, tri-color cats almost always are female, although occasional males crop up (about one in 3,000, according to this excellent article by Barbara French) Those rare males are almost always sterile, also for reasons of genetics, so don't expect to gain a fortune by selling your male calico cat.
I'm afraid that I can't offer much more assistance for Bella than what you have already done, without being able to see or examine her. If she has not had a trans-tracheal wash, that may be one test that can help determine the type of cells that are present in her lungs, and if the x-rays have not been evaluated by a specialist, that is another possibility, as your veterinarian should be able to send those x-rays to be evaluated further.

Four of the five species of the big cats (the Panthera genus – lion, tiger, leopard, jaguar and snow leopard), the exception being the snow leopard can hybridize with each other to produce numerous hybrids. In fact, breeding of two different pantheras to produce hybrid big cats has been banned in many zoos and animal sanctuaries due to no conservation value of the hybrid, and the risk it poses on the mother that gives birth to it.
Russian Blues are known to be quiet, gentle, genteel cats, and are usually reserved or absent when strangers come to call. When they’re with their own beloved and trusted humans, however, they are playful and affectionate. Russian Blues are active but not overly so. They like nothing better than to spend time pouncing on a favorite toy or chasing sunbeams. They willingly entertain themselves, but prefer games in which their preferred people take an active role. When you’re home, they follow you around, unobtrusive but ever-present companions.
There are other reasons, in the real world, why it doesn’t work, which includes the fact that human – big cat conflict is one of the main reasons cats are wiped out of areas. Captive breeding not only selectively chooses animals that are least fit for the wild but also conditions the cats to not fear humans. That increases the conflict and the result is that not only would the offending cat be killed, but likely any wild cat seen in the area would be hunted down and killed in a case of mistaken identity. That escalates the extinction of cats in the wild.
Russian Blues are known to be quiet, gentle, genteel cats, and are usually reserved or absent when strangers come to call. When they’re with their own beloved and trusted humans, however, they are playful and affectionate. Russian Blues are active but not overly so. They like nothing better than to spend time pouncing on a favorite toy or chasing sunbeams. They willingly entertain themselves, but prefer games in which their preferred people take an active role. When you’re home, they follow you around, unobtrusive but ever-present companions.

The next step would be to have a fine needle aspirate done on the popliteal lymph nodes to determine the types of cells present; lymph nodes can aggregate white blood cells in response to many conditions so an examination of the aspirate would be useful. With other parameters coming back normal, it is difficult to say what the specific cause is; but speak with your Veterinarian about performing a fine needle aspirate to help narrow in on a diagnosis. Regards Dr Callum Turner DVM


Originally hailing from Mesopotamia, now present-day Iran, these kitties won over a guy (OK, more accurately an Italian nobleman, perhaps the first documented “cat man”) who brought them to Europe in the 1600s, says Purina, adding that they later became a favorite of Queen Victoria. Perhaps their regal past is why they’re noted as independent and usually selective about the humans with whom they hang. They’re described as quiet types who thrive in relaxed environments.
Queening is a painful process just like childbirth is for humans and some heavy breathing or panting may occur afterwards for a few days due to discomfort. But if you feel that she is straining or in distress you should visit your Veterinarian to check her over to ensure that there isn’t a retained kitten or another issue leading to these symptoms. Regards Dr Callum Turner DVM
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