In terms of direct work, I think interventions with smaller effects on soil animals as a fraction of those on the target beneficiaries have a lower risk of decreasing animal welfare in expectation. For example, I believe cage-free corporate campaigns have a lower risk of decreasing animal welfare in expectation than decreasing the consumption of chicken meat. For my preferred way of comparing welfare across species (where individual welfare per animal-year is proportional to ānumber of neuronsā^0.5), Iestimate decreasing the consumption of chicken meat changes the welfare of soil ants, termites, springtails, mites, and nematodes 83.7 k times as much as it increaes the welfare of chickens, whereas Icalculate cage-free corporate campaigns change the welfare of such soil animals 1.15 k times as much as they increase the welfare of chickens. On the other hand, in practice, I expect the effects on soil animals to be sufficiently large in both cases for me to be basically agnostic about whether they increase or decrease welfare in expectation.
In terms of direct work, I think interventions with smaller effects on soil animals as a fraction of those on the target beneficiaries have a lower risk of decreasing animal welfare in expectation. For example, I believe cage-free corporate campaigns have a lower risk of decreasing animal welfare in expectation than decreasing the consumption of chicken meat. For my preferred way of comparing welfare across species (where individual welfare per animal-year is proportional to ānumber of neuronsā^0.5), I estimate decreasing the consumption of chicken meat changes the welfare of soil ants, termites, springtails, mites, and nematodes 83.7 k times as much as it increaes the welfare of chickens, whereas I calculate cage-free corporate campaigns change the welfare of such soil animals 1.15 k times as much as they increase the welfare of chickens. On the other hand, in practice, I expect the effects on soil animals to be sufficiently large in both cases for me to be basically agnostic about whether they increase or decrease welfare in expectation.