We recently switched Sulu over to taste of the wild. We have been trying for awhile to find a good fit for him and had heard so many good things about TOW so he has been on that most recently. We are aware of the importance of switching food gradually, but I was wondering if this is needed if we try different flavors of TOW? There are so many, and I'd love to try out some different ones for him. But would I need to gradually introduce each new flavor over time? Or will it not make a huge difference since its all the same brand?