Almo nature sterilised pouches are made to a special recipe to meet the nutritional needs of neutered cats before neutering a cat only eats as much as it needs to meet its energy requirements the neutering process means that this natural regulatory process is lost cats eat more than they need which can quickly lead to weight gain your cats appetite will start to rise within 48 hours of neutering it can rise by around 20 whilst their energy requirements fall by around 30 urinary ston