My four year old tom cat has suddenly become very aggressive?

Tiemanos

New member
I don't know exactly why but he's started hissing at our three year old cat and attacking both my wife and I. He used to be a very passive individual but now he's more like a "Jekyll and Hyde". One minute he's fine and the next it's a case of stand well back and leave him alone. Can anyone out there offer any suggestions?
 
Any changes to the environment? Tension, remodeling, new additions perhaps? If not, perhaps a visit to the vet to make sure the cat isn't in some sort of discomfort.
 
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