ABOVE: An ear-tipped cat means a feral that has been TNR’ed. The ear-tip is universally on the left ear. TNR is practiced in Great Britain (since the 1950s) and Denmark (since the 1970’s) and is now used all over the world. In the United States Alley Cat Allies began advocating, legalizing and instituting the practice beginning in 1991. https://resources.bestfriends.org/article/tnr-stray-cats-meaning-history-statistics.
COMMUNITY CATS: If there are free-roaming cats around your home that are not ear-tipped, you are soon going to have a Community Cat Colony. A single cat can have 3 litters a year— perhaps 18 kittens will soon be looking at you very innocently and will begin their own families at about 6 months old. These free-roaming neighborhood cats are many times feral from lack of human interaction as kittens. To sustainably and humanely control these community cat populations Trap, Neuter, Return, Care (TNRC) is universally utilized worldwide.