Hello I was wondering if there was some kind of chart or formula to predicting the adult size of savannah cats. I currently Have one f4 silver male that is around 10.5 weeks old and weighs about 4.25 lbs. His dad is an f5 i believe and he weighs around 33 lbs and his mom is a f3 that weights around 18 lbs. I was just wondering How big he can get?? 4.25 lbs seems a little big for a 10 week old kitten But I don't know.