Feline Formula. Barley Grass Juice Powder. Give them what they want. Advanced Nutrition. Better than Grass. Cats instinctively eat fresh green grass rich in vitamins, minerals and enzymes. However, that same grass is full of pesticides and chemical fertilizers that can be harmful to their health. Another problem with eating whole grass is that each blade is covered with microscopic barbs that can cause stomach and throat irritation. Since Green Foods uses only fresh juice - without the barbs - their barley grass powder is good for your cat... and your carpet. No Pesticides or Unhealthy Chemicals. The barley used in Barley Cat is grown without the use of pesticides or chemical fertilizers and is the same barley that is used in their human products. Optimum Health. Regular use of Barley Cat promotes healthy skin and coat, freshens bad breath, and supports digestion. It also may help increase energy levels, especially among senior cats.