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The largest cat breed is the Ragdoll. Male Ragdolls weigh between 12 and 20 lbs (5.4-9.0 k). Females weigh between 10 and 15 lbs (4.5-6.8 k).

I think Moose is about 15 lbs now...which is why his name is Moose...instead of his given name Smokey. But, he has big bones, a more muscular cat, yes, a little on the porky side, but we must consider age and bone structure! He does get mostly low glycemic cat food...like all of them...but if he gets too hungry and there is no available food, he will literally eat the house. Anything he can find to much on, he will eat it, and then throw it up later. Last week, it was Peackock feathers. At least, those are organic!