Hi Kristi
welcome to yorkie talk! I think the ingredients list in taste of the wild read purdy darn good. There are a couple if things I would want to consider though: the kibble size is too big for my girl, but my girl is pretty small- how is your pup doing on it? Tow does come from diamond brand and as an umbrella corporation diamond has had some recall frequency. That said, almost every brand has had a recall at one point or another- I don't know that any of tgeir recalls have been tow specific either and I believe most of their recalls came from the same plant which was/is an older building and has a history of issues. The northwest plant (didn't think to look at your location before I started babbling) has not seem to have any problems. The other thing I would want to keep my eye on is that tow has multiple protein sources and if you have digestive or allergy related issues it can be difficult to weed them out when you have multiple proteins. Overall I think thy are a good food and I know a lot I people who use it and are very happy with it.
We use natural balance small breed bites (duck and potato right now) and first mate chicken and blueberries small breed. We recently did solid gold small breed bison and oh my gosh I think it was the best food we ever had. If we could just get through this ten pounds we are sitting on I may never buy anything else. Sometimes though, I wish we made our own food- I'm not there yet, maybe one day