I have been milking my goats for a few months in happy ignorance that I was supposed to use a teat dip. For the last week I have using an iodine based teat dip that you dilute 1:4 with water . I've now noticed that one of my goats has a sore patch on one of her teats and it seems likely that it was caused by the dip. Should I keep on using the dip or does anyone use a gentler alternative? I'd be grateful for your advice. Thanks, Kaitlin.