Hi everyone! I've recently noticed that there is a white residue left behind in spots where my piggy pees. I've heard this could be caused from too much calcium in their diet. What could be causing this high amount of calcium? I currently use (broken link removed) and these pellets. I've been feeling them fresh veggies consisting of mostly romaine lettuce, bell peppers, and small amounts of spinach, kale, and carrots. What types of vegetables are low in calcium?