Welcome to the farm!
'See, becoming a cow isn't so hard, is it? Let's make sure you don't forget what you are.' He pulls out a marker and starts writing on you.
[Write COW on your cheeks, using your mouth as the O, UDDER on each tit, and TEAT around each nipple. Add MILK ME across your belly/under your tits, and BREEDING HOLE on your inner thigh, with an arrow towards your cunt. On the other thigh, add LIVESTOCK. Make all of these as large as you can.]
'I think it's time we gave those udders some attention. After all, what are cows good for if not their udders?' He reaches under you and aggressively gropes your tits, so hard it hurts. Then he pulls out two cable ties, and wraps them around the base of your tits, pulling them tight enough to make them bulge lewdly.
[Tie up your tits. Ideally with cable ties as described, but rope or string also works - if you can, let your tits hang, and wrap rope or string around the base of each, as many times as possible, nice and tight, till they're taught and bulging. If not, tie a chest harness and feed rope underneath it to wrap around the base of each. ]
'Now, let's make this cow useful.' He pulls a large machine towards you and you try to pull away, but can't given the chained collar and bound limbs. He sighs as he sees your attempt, and uses the catteprod again, this time on your tits. [Spank each tit 5 times, hard as you can. Make sure at least one blow lands on each nipple.] 'What have I told you about being grateful? Useless fucking animal.'
He attaches your nipple to the milking machine, and turns it on. [Apply nipple suckers, make them secure but as gentle as you can for now.] It feels painful, but almost good.