Hi Melissa, I have used well over 1500 of the Avecon self testing kits on our clubs ferrets. We used to cross check results with the CIEP test but for the last year we have relied on the Quick Test Kits. They seem very reliable and simple to use if you follow the direction properly. In fact in 2002 we had loads of problems with the CIEP tests and had to retest nearly 50 ferrets. I do not think there is much difference between the tests and nether test is 100% failsafe. The most important thing to do when using the saliva tests are making sure the ferret has not got hold of any food at least one hour before testing. One little piece of kibble eaten or as I caught one idiot doing in a testing session giving Ferretone, will mess the test up. Chris. Wessex Ferret Club (http://www.wessexferretclub.co.uk) [Posted in FML issue 4697]