Appreciating various perspectives and solutions posted in this thread very much including info on building habitat for birds and snakes. Trying still to wrap my head around feral cats as part of a food chain / food web if they eat all they hunt, and cats as "useful". I surely understand that part with feral cats about eating all they hunt, including but not just saving on the cost of pet food. The only part I'm not clear on is - aren't feral cats, any cats, an introduced species? Please forgive me, i'm in a metropolitan cosmopolitan kind of an area, where cats are useful as a combination of companionship, affection, entertainment and amusement. We like watching my cat seem to walk sideways up the top part of our refrigerator after leaping up from the floor, she sleeps with me under the covers, she can be annoying but she's mostly a pleasure to have around. And where i live mice will try to burrow in from behind the oven maybe once every 5 or 6 years. But i'm trying to get the picture from a farming point of view, from agriculture point of view as well as ecologically, and all these comments are helping. It's just that if a species is essentially introduced, does it become a part of the natural food system? Does it displace another animal in the course of doing so? Am i trying too hard to get this, just need to squint a little and I'll see it? And are cats on a farm considered useful if they provide companionship even if they don't control rodents? Last but not least, if cats are kept indoors, is that mostly for their own safety, such as protection from allergies in example given, or also to keep them from killing too much for sport? And just to thicken the plot a tiny bit more, this just in from Sydney Australia - "City Imposes Cat Curfew to Bring Peace to Possums" - any thoughts on this? -
http://www.treehugger.com/files/2011/06/city-imposes-cat-curfew-to-bring-peace-to-possums.php ... thanks kindly and much, david glober in "the big city"