Long and fluffy wool makes a cat very beautiful. However in hot season it can disturb an animal. The cat will fade, bringing upon you additional trouble. Try to cut the pet - if it is correct to make it, process will not give to an animal any inconvenience.
Owners of cats are disturbed more often by excessive "talkativeness" of favourites, than their silence. However obvious dumbness of the pet guards, in particular if business concerns kittens. If the animal is in tender age, it will be hard to find out whether the reticence is sign of the desease or the closed character.