I was confused also in the beginning about home cooking but I asked 107barney a lot of questions lol, and I also spoke through email with Dr. Delaney about the BalanceIT product. He responds very quickly! Chloe has been on a home cooked diet with the BalanceIT canine blend for a month now and it's actually quite simple once you get the hang of it. The BalanceIT website also has a lot of resources to learn about home cooking and you can generate a balanced diet with the EZ generator. If your yorkie has a sensitive tummy, I'm sure if you email Dr. Delaney he'll assist you with what you need to know to make a balanced diet for your yorkie.
All you'll need is the BalanceIT, a little scale for measuring and Ziploc bags to freeze the portions. It's pretty simple!
I haven't used Petdiets yet because BalanceIT by itself is serving me well.