There can be bits of undigested material that end up in urates and feces. Observe her behavior for another few weeks. Soaking regularily is normal but excessive soaking in usually a sign of digestive problems, temps, or mites. If she leaves her water dish and roams around frequently I wouldn't worry too much. Most digestive problems will involve runny stools and/or vomiting meals. If she starts acting funny take a feces sample to your vet.