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Since 2002, Nelson Aguilar keeps in his 136 m2 rooftop a very successful case of permaculture. Known locally as "the rabbit breeder", he is one of many people who have managed to set up a small-scale animal production unit in an urban setting, making use of locally available resources. The system consists of an animal and a plant component. Rabbits, guinea pigs and chickens constitute the animal component. With more than one hundred rabbits, this is the most economically important component. Underneath the rabbit cages there is another confined area, with 40 guinea pigs and in a nearby area Nelson keeps 15 chickens. Nelson produces mainly condiments such as red pepper, basil, garlic, small onion and oregano, but he also grows medicinal plants like aloe, linden tree or noni (Morinda citrifolia) and some ornamental plants to make the place attractive and provide shade to the animals. In the winter season cabbage, tomato and other vegetables are grown. Cages, drinking containers, nesting boxes, and tools were designed and constructed by Nelson using locally available materials. This saved him the expenses, and it enabled him to make specific adaptations to the classic designs so that they would suit his situation and ideas. The design of the system allows all residues that are produced to be recycled within the system. In this way, the limited feed resources are used as efficiently as possible. The diet of the rabbits consists of fresh grass cut from gardens and green areas in the city as well as fresh vegetable wastes. This part of the rabbits' diet can be difficult to obtain in certain zones of the city. The fresh feed is complemented with dry feed prepared at home, using a self-made chopping device, a gas or electricity operated dryer and a "hammer mill". This equipment improves the quality of the feed and the efficiency with which it is used. It is simple to handle and guarantees appropriate storage in the hot and humid conditions of Cuba. The homemade feed is made