Animals don't care about what the food looks like and they certainly don't care about convenience. What they do care about is pure goodness. If your pet does not eat a certain pet food, your answer may be as easy as your pet knows what is good for him or her. But because we as humans desire a pet food as simple as opening the bag up and pouring it into the food dish, we have eliminated good nutrition from the important equation of Pet Wellness. Many pet foods found on the shelves of today's pet stores contain grains and fillers.
Grains act mostly as filler to increase dietary fiber, but many pet foods contain too many grains.
Most grains found in pet food tend to be simple carbohydrates. The end products after digesting grains are usually simple carbohydrates, which in other words are sugars and starches. Sugars and starches end up feeding cancer or other diseases. The body works hard to filter the excess or unwanted end products of digestion. I mentioned above about meat by-products and meals.