[Mia and Wickett]

I decided to call up the companies on the Premium foods sticky and ask for samples. And now I've got tons of samples here. Artemis sent me a whole box!!!!

So.....now that I've got the samples, how exactly do I go about trying them out without upsetting Wickett's current diet? He was on Eukanuba, which he wasn't eating, so I switched him to Nutro Ultra (the best I could find at Petsmart). I'm just not sure how to tell what he really really likes or what he eats because he thinks it's a treat. Any ideas? How have you guys gone through the food search process?