It’s an interesting project, thanks for doing it. But if you are measuring suffering in DALYs, shouldn’t you look at the number of animals alive at any time, rather than the number slaughtered every year? Because most slaughtered chickens live for only about 6-8 weeks, while some animals like diary cows can live for years. I don’t see where in the write-up you account for this difference. You can see estimates of how many captive animals of each species are alive at any time here or here. If you want estimates for specific fish species, they can be found here.