I have a 6 year old (3/5/05) 6 lb. Tea Cup Chihuahua. I brush her teeth and noticed the gum by her 1 'eye' tooth is a tiny bit 'purplish' in color. she is not acting or eating any different. Before it becomes a problem, I am inquiring for a non-invasive topical ointment I may be able to apply to 'kill' any infection. I appreciate your input. Thank you.