I remember awhile back Roseanna (dostthouhavemilk) said she was having a problem with high cell counts in some of her older cows. Well, at the farm where I work, we switched to using a product called "Blockade" as a post-dip, with really good results. Our cell counts already had been low, but they went down even more, enough that we started getting a premium for the milk. (My boss joked that the premium just about pays for the difference in price of the dip!) (We are still using a cheaper kind for the pre-dip.) We also started seeing less mastitis. Anyway, just thought I'd pass this along in case anyone finds it helpful.