The behavioural cue of ‘flexible self-protection’ is a way to establish whether an animal feels pain, scientists say
Crickets that received the hot probe “overwhelmingly” directed their attention to the affected antenna – they groomed it more frequently, and tended to it over a longer period of time, he says. “They weren’t just agitated and flustered. They were directing their attention to the actual antennae that was hit with this hot probe.”
Over the many decades I’ve been alive, there have been regular articles saying “scientists discover that such-and-such an animal may feel pain.” And then its forgotten and people continue to treat animals terribly, until a couple of years later a similar article comes out. I can’t see where the thought would even come from in the first place that these animals wouldn’t feel pain, except for religious dogma and a desire to continue abusing animals while telling yourself it’s OK. There’s no reason to even suspect most animals aren’t feeling pain.