My "backyard" processing couldn't be any more sanitary but then again, it's just me and my family, not some hired hand who is helping us. As someone who has benefited from commercial ag farming and understands the pains the small independent farmer goes through, I give my eye teeth for opportunities to support them even if it means paying a little more. If your operation is small, you're more likely to be attentive to problems and can cull when needed rather than not seeing a broiler with broken legs that can't make it to feed. So in my eyes, tractoring is always to be more humane simply because it allows more visual contact for health reasons and more "earth" contact for the birds.