I just started mine on Canidae and they seem to like it ok. I also just bought some Merricks and as soon as it gets here I am going to mix the two and see how that works.
Neither of my babies would touch the Chicken Soup either, they don't like the plain Canidae it has to be the chicken and rice one. I also tried Natural Balance and they wouldn't touch it. They won't touch Nutro and a couple others I had samples of.
I did find a Castor and Pollux (I think that is the brand) at Petco that was very good and they ate that pretty good. It has pieces of fruit and veggies in it.
Good Luck