Once the Thrianta reaches its full adult size at approximately six to seven months of age, its dietary requirements shift from growth-oriented to maintenance-focused. The transition from alfalfa-based pellets to a timothy-based formulation should be completed by this point, as the lower calcium and protein levels in timothy pellets are appropriate for a mature rabbit and help prevent the development of urinary sludge and kidney complications associated with excess dietary calcium. Offer one-quarter cup of high-quality timothy pellets per five pounds of body weight daily, adjusting slightly based on the individual rabbit's activity level and condition.
Unlimited timothy hay remains the single most important component of the adult Thrianta's diet and should constitute approximately 80 percent of its total food intake by volume. Hay provides the long-strand fiber necessary for continuous dental wear, healthy gut motility, and the maintenance of a robust cecal fermentation system. The Thrianta's compact build means excess weight can accumulate quickly if the diet is too pellet-heavy or if treats are offered too liberally. A rabbit carrying extra weight may develop fat deposits around the dewlap, along the spine, and over the hindquarters, which increase the risk of sore hocks, arthritis, and hepatic lipidosis.
Fresh vegetables should be offered daily, with a target of roughly one packed cup of greens per two pounds of body weight. Rotate through a variety of leafy greens including romaine, green leaf lettuce, cilantro, dill, basil, and dandelion greens to provide a broad spectrum of micronutrients. Limit higher-oxalate greens such as parsley and spinach to occasional offerings rather than daily staples. Introduce any new vegetable slowly, monitoring droppings for 48 hours before making it a regular part of the rotation.
Fruits and starchy vegetables should be regarded as treats and offered sparingly, no more than one to two tablespoons per day. A small slice of apple, a few blueberries, or a thin round of banana provides an appealing reward without delivering a problematic sugar load. Monitor the adult Thrianta's weight monthly using a kitchen scale, and palpate the ribs regularly. You should be able to feel the ribs easily under a thin layer of flesh without pressing hard. If the ribs become difficult to locate, reduce pellet quantity and increase exercise opportunities before the weight gain progresses further.