People would far prefer to have 1 hour of pain and the knowledge that it would be over at that point than have 1 hour of pain but not be sure when it would end. They’d also prefer to know when the pain would occur, rather than have it be unexpected. These seem to significantly change the moral importance of pain, even by orders of magnitude.
This seems like an argument for animal pain mattering more compared to human pain when the human expects the pain and/​or expects it to end.
This seems like an argument for animal pain mattering more compared to human pain when the human expects the pain and/​or expects it to end.
EDIT: Mentioned by Pablo already.