animal tf story unusual surgery

a young girl named maddison was interested in african animals especially lions and wanted to live among them but had a rare medical issue that meant that if she would need a new thing to help with her heart but the rare part is not in 95% of humans and there are no donors but they know the part is not only common in lionness cubs but they have more than they need and they make an agreement that in exchange for a donation they will give her the part. madision is taken to the hospital feeling very weak and fell asleep while the surgery happened they then leave her to recover as the sun set her body itself changed into a cub supprsiing everyone as a procaution they take her to the nearby lion saunctuary to wake up but keep her parents close. madison wakes up next to the donor cub and realises her body had changed and than remembers she was supprsiingly born a cub but had to be human for a while due to the msiising part it all ends well though and she is now a cub.