"Clearly, the three of you aren't yet acquainted in a wide enough variety of forms," Mr. Hawkins said. "You find one form that works and you use it over and over. That won't fly in the real world. It's a dangerous place. If you don't want to end up at the bottom of the pecking order, you have to learn to... adapt."
Mr. Hawkins waved his hand, and Justin and the two sow girls began changing. Justin shrank and the sow girls grew until all three were about the same size. They all grew hair across their bodies that curled and thickened into wool. Justin saw his cock disappear before his eyes and turn into a soft pussy. Justin's tusks disappeared, and he grew two rows of large, plump breasts. Soon all three of them were sheep-girls. Justin's wool was black, and the wool of the two other girls was white.
"There. Now it's up to you to get out of this. If you attempt to take any other mammalian form, including your original human forms, you'll simply revert to sheep-girls again. Consider it extra credit."