I’ve never read anything quite like it. I picked it up in a second hand store for a couple of bucks while travelling, read it the first time and was completely confused, thn re read it a second and third time.
My takeaway is that it’s an exercise in suspension of disbelief. The third time through I’d accepted that it was just…weird…and it became a grimy unsettling story about complex people with complex motivations.
Eta - modifying the diet of a domesticated animal for your convenience seems to run contrary to the premise of minimising animal cruelty.