I used Vita Ferm tubs last year and felt they helped. But they are hard to buy in this area. Among my other options that are readily a available are Purina stress tubs and Moorman's stress tubs. I know Moorman's are usually a good product. They were 4 dollars a tub higher than the Purina tubs but both are cheaper than the Vita Ferm tubs. I bought 2 of the Purina tubs and will do some research before I need more. Would like input from anyone who has experience and opinions about any of the 3.