Need to rehome 5 yr old Newfoundland.

I have a 5 yr old newfoundland that i have to painfully rehome. Not spayed. Very loving and playful. She loves to swim and run. The bad. She is currently in quarentine for nipping a little girls hand. This is her second one in 4 yrs. This behavior is out of her character. I absolutely do not want to put her down because she is a good dog. I am NOT CHARGING A REHOMING FEE TO A GOOD HOME. Lola is worth more than a fee.