Instructions
Feed your rabbit extra hay grasses. These include a combination of alfalfa, oats timothy hay, wheat and barley. Adjust the combination to see what your rabbit has the most appetite for and increase the provision of those grasses. The recommended serving is 1 cup per 2 pounds of body weight daily, so increase that serving if you want to fatten up the rabbit.
Provide your rabbit with fresh vegetables. The recommended allowance is 4 cups per 5 pounds of body weight; as with grasses, increase this amount to provide your rabbit with more food.
Give your rabbit commercial food pellets. This is the most efficient method to increase a rabbit's weight, according to the House Rabbit Society, because the pellets are packed with nutrients, fiber and protein. Look for pellets with at least 18 percent fiber content. Commercial rabbit breeders use pellets to increase a rabbit's weight quickly and efficiently. Provide a minimum of 1 cup of pellets each day.
Avoid feeding rabbits dried fruit, seeds or artificially colored cereals. They are unhealthy for rabbits and are essentially rabbit junk food. The high sugar content facilitates bacterial growth, which will hinder your effort to fatten up your rabbit.
Measure the rabbit's weight over days and weeks to keep track of any gains.
How to Fatten Up Your Rabbit
Rabbits are a common household pet valued for their small size and docility. Like any pet, owning a rabbit requires taking care of it properly. You must look after its medical, dental, emotional and nutritional needs. A rabbit's diet consists of a variety of foods, including grass, straw, timothy hay, vegetables and processed food pellets. If you're trying to fatten up a rabbit, whether for health reasons or to raise it for eventual consumption, you need to adjust its diet.