I have a Male guinea pig named Moe. Today I noticed his pee was orange? I wasn't home to be sure it was pee but it's on his white cage fluff. I am not sure of his exact age but we have had him for about 2 years ... not sure how old he was when we bought him from PetSmart. Can anyone help me with this? He eats a cup of kale a day and he has a blueberry or two or carrots as a treat. He seems to be acting normal ... can anyone explain to me what the orange spots are?