Hmmm where did you get this information? I haven't heard of any Bobcat/Siamese crossing. Just because a cat has a bobbed tail, does not mean it was crossed with a Bobcat. When talking Bobcat, do you mean an American Bobtail, or a similar breed, or a true 100% Bobcat. There is a breed of cat that, as the legend goes, has been crossed with a wild Bobcat. The breed is known as the Pixie Bob. I have 4 Pixies and yes, they do have some traits that do resemble a Bobcat. Not just with their coloring and markings, but with their behaviors as well. Amber and Boris, pictured in my signature, are true wild Bobcats. The idea of crossing a Bobcat with any domestic cat is not as easy as some may think. For one, Bobcats are very aggressive breeders and have been known to kill each other while breeding in captivity. The thought of putting any domestic cat in with an intact male Bobcat is just asking for trouble. The legend of the Pixie Bob is that this breeding took place in the wild, with the crossing of a male Bobcat with a female domestic "barn cat". These male Bobcats may have been older males, who no longer could compete in the wild with much younger males. Whether or not this legend is true has not been proven. Yes, the look of the Pixie Bob does resemble a Bobcat to some degree. The Toyger cat, a new breed of domestic cat, has been bred to resemble a small tiger, the same size as most domestics. The coloring and markings are there, but there is now way that this cat was crossed with a tiger. These markings and coloring come about by selective breeding and take years to produce the final results the breeders are looking for.
If Chester’s respiratory rate is over 100 breaths per minute you should visit your Veterinarian immediate for an examination since this is well over physiological range; infections, anaemia, allergies, congenital anomalies, foreign objects, fluid, parasites among other causes may be the underlying cause. I cannot give you any at home advice in a case this severe except to visit a Veterinarian for a thorough examination. Regards Dr Callum Turner DVM
The TICA Chausie breed standard allows three colors: solid black, black grizzled tabby, and black (a.k.a. brown) ticked tabby.[8] Because the Chausie breed is relatively new, Chausies are still frequently born that have a variety of other colors and patterns, and they make wonderful pets. However, only the three permissible colors are considered ideal. Only cats in the three permissible colors can be entered in new breed classes at cat shows, and only the three colors will be eligible eventually for championship classes. Gold or yellow eye color is preferred, though yellower and lighter shades of green are allowed.
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.