One of my senor cats, a 10 year old female, has been having diarrhea and bad gas often. I was told it might be the food. I am feeding science diet senior, and in the past fed friskies. What dry food is better and healthier for my cat, and has the least non-natural ingredients. I also feed friskies canned food but I dont think that is the problem as I have always fed that with no issues in the past.