The context OP was speaking to is factory farm conditions relative to animal welfare on the "traditional" 100 herd farm. Fields, grass, no hormones or unnecessary antibiotics.

Singer argues that these conditions aren't good enough, agriculture inevitably leads to stuff he can't live with. That's a reasonable thing to argue. I disagree. It's not reasonable to argue that these conditions are a practical impossibility. That either prices skyrocket or cows can't fields. It's not true. It is possible, and common.