Sarcasm is an adjusted stress reaction.

My family's usual response to a roast involving myself and my brother (me: no red meat, H: NO MEAT EVER) is to just give us LOTS of roast veggies. Which I don't mind at all.

But vegan cat food: yeah, just no. (Harvey actually sounds remarkably like our cat Sooty, who was a farm cat killing machine and would eat full-grown rabbits on our doorstep, no matter how much food we'd give him. There's a reason Jasper is strictly indoors-only.)