My almost 4 year old guinea ( Ryan ) has recently ugly, sticky droppings and besides that his penis did not want to hide. I went to the vet but he said this is through his diet . Because Ryan has a sticky droppings which Ryan has to push, his penis also fell out . Ryan has limited vegetables but nothing has changed . I'm going to again take him to vet but I would like to know whether you also had an experience with sticking out willy.