Just adding my 2 cents, but my pup (16 weeks old now) switched on the Chicken Soup when I first got her and we didn't do a gradual change either. She really had no problems at all. Not sure if it was b/c the Chicken Soup is such a good food or I just lucked out w/ a dog that has a stomach of a goat..lol.

At any rate, she was on IAMs (lady I adopted her from fed her that) so I thought the change over could be a bad one, but like I said it worked out. So, hopefully your baby will have the same luck!