Mature cats face an increased risk of 'older cat' problems such as diabetes, kidney disease, high blood pressure, hyperthyroidism and cancer. Close monitoring is important, focusing on common signs of disease in older cats such as poor coat condition, vomiting, diarrhoea, constipation, reduced appetite, weight loss, change in thirst, inappetence, changes in urination, reduced locomotion, reduced hearing or vision, reduced awareness and interaction, agitation or night-time yowling. Obesity peaks in cats aged between six and eight years, so extra care needs to be taken with feeding.