I have an 8 year old german shepherd mix rescue named Maggie. She was spayed over 18 months ago when taken in by Dallas Animal Services. As of 6 weeks ago the area looked perfectly clean and healthy. I cleaned the area anyway with a soft wash rag and boom, this white line appeared which I can't get to go away. 12 days ago Vet started her on Simplicef 200mg which was given for about a week. I also clean the area with DouxoS3 containing Chlorhexedine, let it dry, then apply Mupirocin Ointment 2% once or twice daily. Not seeing any real improvement or worsening. Any thoughts?