"Who do you think you are?" they ask.
"Make your choice or I will choose for you." you interrupt.
"Then I will choose Tiger" she says.
"I will join my girl" he says.
You grin evilly and silently make the wish.
First the stripped fur covers them replacing his clothes.
The next change is the biggest shock. His chest grows out into a pair of breasts as her's flatten. Between their legs also changes to match.
"Why?" they ask. "She wished to be a tiger and to keep you as a mated pair you needed to be a tigress."
"But I meant for me to be the female" the former female says. "Well you should of been more careful" you reply.
The tails are the next things too form, swaying. The face forms stretching out into the muzzle and the ears.
Claws form and they look at each other before they pounce towards you. Grinning they pass right through you and you smile back at them through the bars of their new cage.
"Let us out" they say before you reply "If you did not want to be an animal you should of picked human"
The paws are the next to form and soon two anthro tigers are in their cages.
"If you want or if you cause too much trouble I can always make you into full tigers" you say before leaving them alone in their cage.
"Now for more creatures" you think to yourself.