Why did Penny Baxter allow Jody to go find the fawn and raise it?

Penny could never believe the fact the fawn was alive. Jody killed the fawn’s mother to save Penny’s life. So, it was their responsibility to take care of the young fawn and not leave hime alone in the forest to starve. So, when Jody requested his father to allow him. Penny gave his consent to find the fawn and raise it.