Cats Cat desexing Cat desexing is mandatory in Australia for cats born after 1 July 2018. Cat microchipping Cat microchipping is compulsory in Australia for cats born or adopted after 1 July 2018. Cat owners Being a cat owner comes with many responsibilities including desexing, microchipping, and microchipping (with registration). Neighbour's cat (nuisance) While cats make great companions we understand that uninvited cats trespassing on your property, such as a neighbours cat, can be a real nuisance. Stray cats Stray cats and similarly feral cats become nuisances when they make themselves at home on your property.