What puppy food should I switch to for my puppy's health?

Hello and congratulations on your puppy! There are many great puppy food brands out there. I recommend that you go with a well-known brand that has a good track record of high-quality food that is well-tested. The brand you choose will depend on how you'd prefer to acquire it and how much money you'd like to spend. You can find quality food at all price points. On the lower price side, you've got brands that you can find at the grocery store, like Purina One. Middle-of-the-road brands can be found at big-box pet stores (e.g. Petco), and include Iams, Eukanuba, Science Diet, Wellness and Royal Canin. Higher end foods can also be found at the big-box stores, but smaller company brands may be easier to find at small, private pet stores, like Innova and Merrick. Whichever you choose, be sure to change Joey's diet slowly over a week's time to prevent stomach upset. Start by mixing 1 part of the old food with 3 parts of the new food, and increase the amount of the new food over the course of about 5-7 days. Good luck, and I hope Joey grows and thrives!