Hello so my cat is around 8 years old and is a outdoor cat. He came in today and is very low energy sitting in the middle of my room on the floor which is very unusual for him. He is breathing very rapidly, and aggressively. He sometimes makes a little noise out of his mouth. So I don’t know if this is something small and I shouldn’t worry, but this is my first day of seeing this symptoms so if it continues then I’ll go see a vet.

It’s a good idea to keep a Russian Blue as an indoor-only cat to protect him from diseases spread by other cats, attacks by dogs or coyotes, and the other dangers that face cats who go outdoors, such as being hit by a car. Russian Blues who go outdoors also run the risk of being stolen by someone who would like to have such a beautiful cat without paying for it.
The Russian blue is a sweet-tempered, loyal cat who will follow her owner everywhere, so don't be surprised if she greets you at the front door! While she has a tendency to attach to one pet parent in particular, she demonstrates affection with her whole family and demands it in return. It's said that Russian blues train their owners rather than the owners training them, a legend that's been proven true time and again. 
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