They have the best tres leches anything. They have single serve cakes if you just want to enjoy one for yourself and your partner. Yummy. Or you can order cakes for weddings, birthdays, baby showers. You will not be disappointed.
Specialized food for dogs with kidney disease will typically have reduced amounts of sodium and phosphorus compared to a regular diet. The sodium is usually decreased to alleviate the secondary condition of high blood pressure that many dogs with kidney issues face.
I don't worry much about treats, since they're such a small part of the diet. There are no foods that you have to avoid for dogs with kidney disease -- the goal is to reduce phosphorus levels, but again, if treats are a small part of the diet, the amount of phosphorus in them would not be significant.