If you happen to trap a neighbor’s cat which is not sterilized, you will need to consider whether to spay/neuter him. Our advice is to talk to your neighbor and explain what you are doing and why you want to sterilize the cat. You can also add that by letting the cat outside that they are violating a Chicago City ordinance which proclaims that all domestic animals must be leashed or contained within the guardian’s property. We know of some people who have sterilized neighbor’s cats and they report that most of the time, the neighbor was actually grateful. We know of no cases or lawsuits regarding the spay/neuter of a cat done by somebody other than the owner.
