Avoid foods with lots of filler or long lists of ingredients that are unfamiliar to you. (dogcare.dailypuppy.com)
If you feed a diet that includes lots of fillers and grains that your cat doesn't need, he (or she) will eliminate those fillers — right into the litter box. (catingtonpost.com)
How much money is wasted buying cheap seed mixes with lots of fillers when half of it ends up on the ground? (petbusiness.com)