At what age should a cat be sterilised?

In general, cats are sterilised when they are 6 months old. However, some female cats do come into heat at an earlier age. Signs of heat include increased appetite, restlessness, being more affectionate than usual and emitting short low calls. At this point, she will also start to attract males. Tom cats, on the other hand, when they reach sexual maturity, will instinctively spray their surroundings with strong-smelling urine. Look out for these signs and take your cat to be sterilised immediately once you see them.