Like all TNR methods, this does absolutely nothing to stop them from spreading deadly diseases and destroying all native wildlife. They don't just kill birds you know. They destroy any animal and insect that moves. Which causes all those animals that depend on that animal as their food-source to STARVE TO DEATH. You don't have owls, hawks, or foxes by you? Blame cats being there, causing their ultimate starvation and extinction from your area.
I found some surprising things about all the diseases these mangy invasive vermin are now spreading throughout the USA. They are nothing but 4-legged bags of disease-vector now.
These are just the diseases they spread to humans, not counting the ones they spread to all wildlife. They include: Campylobacter Infection, Cat Scratch Disease, Coxiella burnetti Infection (Q fever), Cryptosporidium Infection, Dipylidium Infection (tapeworm), Hookworm Infection, Leptospira Infection, Plague, Rabies, Ringworm, Salmonella Infection, Toxocara Infection, Toxoplasma. [Centers for Disease Control, July 2010] Flea-borne Typhus and Tularemia can now also be added to that list.
The plague:
http://outbreaknews.com/2011/0...
Tularemia (rabbit-fever, transmissible to humans):
http://www.news-gazette.com/ne...
Flea-borne Typhus:
http://www.ocregister.com/arti...
Along with the usual parasites they all carry, like hookworm -- that ruined businesses in parts of Miami:
http://articles.sun-sentinel.c...
And perhaps the most insidious one of all, the common Toxoplasma gondii parasite that they spread through their feces into all other animals and even livestock. This is how it gets into meats and humans get it from undercooked meats, from cats roaming around stockyards and farms. This parasite not only changes the mind of the animal it invades (including the minds of humans, it being the cause of the crazy-cat-lady-cat-hoarders and TNR-advocates),
http://en.wikipedia.org/wiki/T...
http://wildlifeprofessional.or...
http://www.economist.com/node/...
http://healthland.time.com/201...
http://www.npr.org/templates/s...
but can even kill you at any time during your life once you've been infected by it. It becomes a permanent lifetime parasite in your mind, ready to strike at any time that your immune system becomes compromised. It's now being linked to the cause of autism, schizophrenia, and brain cancers. The weirdest part of all, its strange life cycle is meant to infect rodents. Any rodents infected with it lose their fear of cats and are actually attracted to cat urine.
http://news.nationalgeographic...
So even the often proclaimed use for cats to control rodents is now false. Cats actually attract rodents to your home, with their whole slew of flea-borne and other diseases. If you want rodents in your home keep cats outside of it to attract them to your area. The rodents will then be herded to inside of your home by your outdoor cats. (I had this very problem happen until I ridded my land of all feral-cats. Cats now gone -- rodent problem now gone -- as it was before the feral-cats invaded my land.)
Rabies, the one most often mentioned in stray and feral cats, is just one of the minor concerns. And even having your cat vaccinated against rabies doesn't prevent it from bringing in a mouthful or claws full of fresh rabies virus every day to you after you've let it out to go shred apart that rabid bat behind the garage or in the shrubs.
The time has come to destroy them all whenever spotted away from quarantined confinement. There's no other solution. We have nobody but cat lovers to thank for this disaster.