Have a question about switching my dog to a wet/dry food diet?

It's all up to preference. It won't hurt to feed the combination only a few days out of the week, but I prefer to give my dogs both canned and kibble every day of the week. Your dog might start refusing kibble by itself, though, if you only do the combination a few days of the week. If your dog is finicky, that is. If your dog is one of those dogs that eat anything she's presented with, you'll have nothing to worry about.