A Lot of Bull?

I'm running out of pets. Could milk cows serve as pets? There is PET milk . . .

Cows, Cows

Cows are quite cowardly creatures,

and they never feel shame for that.

It's the best of their endearing features,

since they'd otherwise trample us flat!

But a male cow won't cow, might some say,

to which I would loudly cry, "Bull!"

There is no such beast, might I nay

say, though Meinong's odd jungle be full.

I used to call "Hereford" bulls "heifer" bulls. The two words sound similar in Ozark dialect.