Mainecoon Mix? (onawa)

Was told she was purebred mainecoon unaware of that’s true or she’s mixed. She is about 5-6 months old and the only reason i am rehoming is she has been in my house for a couple months and is not getting along with my dog at all and is very scared of him. asking 1OO. She is not fixed but she is still young. I just want her to go to a good home. I am located in onawa but will meet.