Time to have a vet do a urinalysis and a CBC with Chemistry Panel! Some ferrets just are stinkier, but sometimes there is a medical problem, so the vet will need to check. If you don't have a ferret-knowledgeable vet go to http://www.ferretcongress.org and click on the crit refs listing on your left. Then scroll down that to the links of ferret vets people have sent to those links. If you you are in central NJ we use Joe Martins of Bellemead Animal Hospital 1-908-874-4447, 872 Rt. 206. There is info on the Pretty Bird food and an assortment of other foods in archives, both http://listserv.cuny.edu/archives/ferret-search.html and http://fhl.sonic-weasel.org [Posted in FML issue 4362]