All my ferrets love Ferretone, Laxitive, 8 & 1 Fruit Crunch Treats, Peanut Butter Crunch treats, Ferret Bites and Ferritvite (vitamen supplemnent) I don't give the the Ferritvite, because they really don't need it, the only one I did give it to was Sampson and not that he isn't sick anymore he dosn't get it either.
They also love Cereal and Peanut Butter (w/out the nuts!) which we give to them sparingly and the reason the PB is with out nuts is because they could choke on them. They love fruit, exspecially rasins, but its not good to give it to them all the time. Jessie likes some of the more meaty flavor treats. She is the only one that does though. I also tried Yogies, which for awhile Buddy use to love them, but I guess he got sick of them.
I give up on treats now, the only thing I buy now is Ferretone and Laxitive. Otherwise, I just give the household foods that I feel are safe for them and they only get it maybe once a week to once a month. Treats are mainly good for training, but other then that, their treat becomes freedom and attention.
As for animals at petshops, etc. thier is a flaw to every store and sometimes the flaw is the products and sometimes its other things. I decided that I am going to start adopting more then getting pets through the petstore or breeder. Petco does get all thier ferrets from Marshall Farms. Infact alot of petstores get thier ferrets from Marshalls. How you know that your ferret is a Marshall ferret is by the two blueish dots on your ferrets right ear. Each dot represent two things, one is for being neutered/spayed and the other is for being descented. And yes, they usually give thier ferrets thier first distemper shot before shipping them out to petstores.
All my ferrets are Marshall Farm Ferrets. You can go to the Marshall Farms Website to learn more about thier ferrets and products at www.marshallpet.com
and all thier ferrets come with a record which the petstores are suppose to give to you upon purchase.