My sister has a dog that she got from a lady about a month ago. My sister is a person who really shouldnt have animals, she doesnt want the dog anymore

. Its a female yorkie/chihuahua mix, she is potty trained,crate trained,utd on shots, and im pretty sure she is spayed. I really want to find a good home for her. She is so adorable and so sweet. I think my sister said she is 7 months old.
i really appreciate any help
we are located in fostoria,ohio