Sean and X, I'm talking in evolutionary terms... survival, not play. My cat fetches balls of paper, climbs like a demon and I doubt seriously if she'd ever stay stuck in a tree. But things like that are a result of domestication. Cats are not built to live in trees, they are ground animals.
I don't doubt that a vet would recommend cats eating every day, her business is health, not survival... but they live and remain healthy a long time without food or water... didn't you ever watch Wild Kingdom?
I bagged my 50th cat about a month ago and all this climbing and fetching made me want to know why. I'm not willing to buy that it's just because they're stupid. I got one down that lived in a willow oak for 26 days... 100% outside cat, it was her third time being stuck in that particular tree. The owners have more cats than I can count, at least 20 and none of them get stuck. I got another down that was up for between 17 and 20 days. What would keep an animal away from food for THAT long? Surely the desire to eat had to supersede stupidity at some point.
I'm not saying this to make a point, I really want to know why some cats get stuck and other don't.
There was a research on human autism that somehow involved studying autistic behavior in cats. From that, they learned a significant portion of the test subjects (the cats) could not walk backwards. No reverse gear, no way get down a trunk safely. The owners of Dora, the 26 day cat have been watching her and even called me to say they don't think she's ever walked backward. My cat has no trouble backing up. I've been tempted to test the ones I get down but I usually just hand the bag over to the owner so they can get the cat inside.
Another thing, how many of you have had a cat jump or run down the trunk once you started to work? For me, two. Both ran down the trunk head first rather than the usual backing down. I've seen cats do that lots of times down low but I'm talking 50'+ of vertical trunk.
I won't deny that some cats are dumb as a stump. But the idea that they won't save their own lives because they're stupid is a cop out, there's more to it.
As for spikes, some trees you can't climb safely any other way, cats don't always pick the right ones... maybe that's the stupid part.