Thanks for your replies. It's mainly for my Tiny Mouse chinchilla who is a bit off at the moment, but I like to have some in, just in case. I have always used the Oxbow and added a little Avipro. It has always been well received by the chins. I've not tried Supreme Recovery. I know it's probably cheaper to buy a bigger bag, but with those smaller sachets I find it gets used up without having to open a new sachet, especially if it's only for short term use, which it has been up to now.