Similar to how Givewell (with caveats) says that a donation of around $5000 can save a human life. Has anyone done this with any animal?
I scanned Animal Charity Evaluators site quickly and couldn't find any quantification like this - maybe it's too hard to quantify because mostly these orgs do advocacy?
I found that ACE estimates that the Humane League an estimate of between -6 and 13 farmed animals spared per dollar donated. If anyone has other sources or perspectives to share on this, I'd greatly appreciate it.