I think understanding the science behind animals (all types (endotherms, ectotherms) forces one to see them differently. There are times I long for my anthropomorphizing days, not to say that I don't have them as I still care deeply about and for all my critters (as well as those who do not live with me - ah yes, a new conversation about whether it is proper to use "who" when referring to animals other than humans 
). Even my cricket and other feeders are spoiled and have pretty terrific lives before they become a meal! 
Many months (or years) ago this conversation took place here but with a lot of flaming and accusations (Victor probably remembers that) - it's nice to see that it is remaining rational and friendly.
As both of you have pointed out, there is no question that learned behavior and differing cognitive levels do exist among species. I would say that insects and arachnids are probably the only ones that are entirely "mechanical" in their response. Anyone who has worked with/kept/studied/been fascinated by these 6 and 8 leggers will most likely agree. But, mechanical or not, they too have a central nervous system and can therefore feel pain and suffer as well. In the rare case I kill an insect (never a spider!) I make it quick and painless. Many may laugh at me, but such is life…and death.
lele
-----
Chameleon Help & Resource Info
0.1 Veiled Chameleon - Luna
1.0 Beardie - Darwin
0.2 felines - Kyndra and Lita
0.1 African Clawed Frog - Skipper
0.3 Mad. Hissers (2 died ;(
0.1 Chilean Rose Hair Tarantula - Rosa Leigh
0.1 Goliath Bird-Eater Tarantula - Natasha
