Burgess Excel Rat Nuggets are a complete, nutritionally balanced, tasty food for rats. Balanced protein to help muscle growth. Prebiotics support healthy digestion. Linseed for healthy coats. Vitamins A, D3 & E - essential for rats' health. Antioxidants for a healthy immune system. Rats are highly intelligent, so it's important to feed them in an interactive way to aid emotional wellbeing. Hiding food around their housing is a great way to provide mental stimulation and prevent boredom.