Learn how to read commercial dog food labels from Tranquility Dog Toys. I understand it's not practical for most people to never use commercial dog food ever again. Although not best case, you can use it sparingly for maybe a few meals during the week. If you follow the calorie recommendations I make, your dog is a perfect, slim and attractive weight. High fat and sugar levels in commercial food are a leading cause for obesity in dogs --- and obesity is the #1 health disorder seen by vets across the US.