I like to switch toward the end of the bag so he does not bored and gets different protein sources.
Next time I think I may try another of the Nature's Variety Prairie flavor like beef or salmon.
I like the size of the kibble in NV Prairie.
But I know Max does well on Acana (nice poops and he loves the flavors).
NV talks about "rotation" here:
FAQ's - Proper Nutrition | Nature's Variety