minimum 50 x 100 cm, or the equivalent of 0.5 sq metres with at least 15–20 cm of substrate, so that they may exercise their natural urge to burrow. However, greater floor space and substrate depth is recommended for all species of hamsters, where "bigger is always better" . Additional levels do not count toward the base area. Aquariums and DIY-enclosures are commonly used amongst hamster enthusiasts, often preferred for their capability to hold greater amounts of substrate, wide availability, and cost, amongst various other reasons, over their more traditional wire-cage counterparts (See images for examples). If fighting within a group occurs, the hamsters should be separated immediately to avoid injury. Roborovski hamsters are very active, so a species-appropriate wheel is a necessity. Size is still debated, however the general consensus is that a wheel should be at least 16.5 cm (6.5 inches. Other sources recommend a minimum diameter of 20 cm(8 inches). Roborovski hamsters, like many rodents, will naturally avoid large open spaces, opting to stick close to the walls if forced to cross one, where they feel safest. Providing them with multiple hiding spots is vital. This can be achieved by placing branches, tunnels and various other hides in close arrangement. Food Based on their natural diet, owners should feed hamster food containing mainly grains and small seeds. Animal protein should also be offered, in form of mealworms, grasshoppers or other insects. If you do not like to feed them alive, you can purchase dried insects. Some hamsters also accept seafood such as dried gammarus. To support their natural behaviour of foraging and stockpiling, feed should be scattered around the enclosure, hidden in several spots, or slightly buried beneath the substrate (Approximately 1tsp of food per hamster per day). Some unsuitable foods, to be avoided, include: Leafy green parts of a tomato (toxic) Meats which are high in fat Chocolate or candy Onions, garlic and bell peppers (can cause stomach irritation) All citrus fruits (too acidic) Apple seeds Aubergine Fresh water should be available at all times. A bowl is preferable to a bottle, as it encourages a more natural and comfortable drinking posture. Hamsters' incisors never stop growing and they have a ‘self-sharpening’ system where the incisors grind against each other while gnawing, which wears the teeth down; so providing them with chew-toys is essential. Bedding/Substrate Nesting materials should be easily shreddable and digestible, such as unscented