Rehoming Frenchie female

She is 2 yrs old great with kids and dogs . She is not fixed never had puppy's she is a pet dog don't want her to go to someone who only cares about breeding her. She has some skin allergies witch could be from eating chicken dog food I didn't know chicken messes with there skin or hot spots I have 3 other dogs it's not from fleas. Her rehoming fee is 500$ no I will not take nothing less for her as I did spend 1500 for her no papers.