05/20/2026
I say this all the time! But this is a good read.
Feed for what you have, not for what you think might come!
🐱 The "Secret Weapon" of TNVR That Only Works Under One Condition… 🛑
Did you know that community cats actually have their own built-in security system?
Once a colony is fixed through TNVR (Trap-Neuter-Vaccinate-Return), those spayed and neutered cats will actively keep unaltered strays away because they are fiercely protective over their food supply.
But there’s a massive catch. (No pun intended! 😉)
🍽️ The Math of the Food Bowl
It all comes down to a wildlife concept called Carrying Capacity—which basically means an environment can only support as many animals as there are resources for - food being one.
Scenario A:
You have 10 fixed cats. You put out food for 10 cats. They will guard that food like gold and chase newcomers away.
Scenario B:
You have 10 fixed cats, but you dump out a giant bag of food meant for 20. Guess what? You just invited 10 new neighbors to the party.
🏠 The "Friendly Cat" Trap
As rescuers, we love "pulling friendlies" from colonies to get them adopted into loving homes. It’s wonderful! But if you take 5 friendly cats out of a 10-cat colony... you must cut the food supply in half.
If you keep putting out the same amount of food for those remaining 5 cats, the environment's carrying capacity is left wide open. New, unaltered cats will move in to fill the gap. This is another way the vacuum effect happens. (We will discuss both carrying capacity and the vacuum effect in detail later)
💡 The Takeaway
It is a million times easier to manage a colony and fix one or two stragglers as they pop up than it is to start from scratch because an overfilled food bowl attracted a whole new colony.
Want to keep your colony stable? Match the food to the fixed felines! 🐾👇
Have you experienced this with your own community cats or watch this happen in your community?
Drop a comment below.