Neutered Norwegian Forest cats tend to be more overweight than other purebred cats

There is a rather disturbing study on the Internet published October 12, 2011 which looked at the body weight of purebred cats, mainly, and also non-pedigree cats. In all there were a total of 539 purebred and 75 non-purebred cats in the study. They found that intact cats i.e. cats that had not been sterilised were nearly always of the correct weight. There were only 7% of intact males and 3% of intact females that were overweight. Overweight NFC? It is desirable that the NFC is large but where is the line between being large because they are overweight and large because they are big boned? Conversely, among the neutered cats they found that 50% of the males were overweight and 38% of the females were overweight. This to me indicates that males are more prone to become overweight after sterilisation than females. And further, it is disappointing to see this high figure of overweight neutered cats. It indicates that owners are not adjusting downwards their cat's diet after neuterin