Face it, who would raise cattle just for fun as pets? Chickens? Turkeys? Hogs?
What is ethical about wanting the extinction of all those species as no one could afford or want to keep them.
Me. I always wanted a cow pet. They are so big and sad looking, yet it only seems to require that tiny wire fence to keep them in the pasture.
I'm still going to eat them though, including my own cow pet - if I had one and was hungry enough.