Erick didn't want to spend the rest of his life as a cow, and if he gave up his memories there was no chance of becoming human again. He looked around as best he could with his new, distorted eyesight. There were no visible doors. He had to touch one of the pads to get out of here.
He stared at the two plates a long time - not so much because he couldn't make up his mind, but because his mind was working a lot slower than it used to.
Finally, he strecthed out his left foreleg and touched a massive cloven hoof to the plate. "You have chosen to leave much of your human life learned knowledge while mixing in some instincts needed for true bestial function. The final changes should be completed in moments."
Erick shook his head as odd thoughts and feelings flared up - memories were still there of his human life, but now he also had memories of being a cow! The strangeness of this animal body was suddenly gone - he felt very comfortable on all fours, and no longer found being a cow unpleasant at all.
"Congratulations. Your change is complete. You will now be sent to a location where you can make the best use of your new bovine form. Goodbye!"
Wait a minute! Sent away? Erick needed to get back into the lab, to change himself back! He started to turna round, but the room flickered once, and he was suddenly in a large, open pasture. There were cattle all around him - this was some sort of big dairy farm! Scents washed over him, strange and familiar. Including one smell that was very strong and very close.
Erick felt something against his rump. A huge bull was snuffling his new cow's equipment, flaring nostrils drinking in the scent that told him Erick was ready for mating. Erick watched the big male with curiosity, his sluggish mind trying to identify something important.
The bull was getting ready to mount him now. Erick lifted his tail aside and braced, knowing this was the right thing for a cow to do. Yet his human memories also started yelling that he didn;t want to get pregnant - he'd never change back then!