I know-be convenient to have some 'spayed' tattoo.
I read this terrible story (with a rabbit-I can *hear* the eye rolls

I know your all going-not another rabbit story Mikey!!

)
But anyways rabbits have an 85% chance of sex related cancer by age 3 if not spayed. So this rabbit shows up at shelter with a spay scar, and they don't spay. Turns out they only removed ovaries (spay in rabbit is generally ovo-historectomy and that's important) soooo bunny has to go thru cancer a) because it was done wrong and b) because they did not know where/when/by who she was spayed by

Soooo yeah tattoos'-I'm thinking...awesome!!