The adult Standard Chinchilla Rabbit, having completed its growth phase by approximately six to nine months of age, requires a maintenance diet designed to sustain its compact five-to-seven-and-a-half-pound frame without encouraging excess weight gain. The foundation of the adult diet is unlimited grass hay, which should account for approximately 80 percent of the rabbit's daily intake by volume. Timothy hay is the most widely recommended variety, though orchard grass, meadow hay, and botanical blends are equally acceptable. The constant availability of long-strand fiber ensures proper dental wear, supports healthy gut motility, and provides the bulk necessary for efficient cecal fermentation.
Pellets in the adult stage serve as a concentrated nutritional supplement rather than a dietary staple. A high-quality timothy-based pellet with 14 to 16 percent crude protein, a minimum of 18 percent crude fiber, and low fat content is appropriate for a mature Standard Chinchilla. The daily pellet ration should be measured carefully at approximately one-quarter cup per five to six pounds of body weight. Overfeeding pellets is one of the most common dietary mistakes in pet rabbit care and leads directly to obesity, reduced hay consumption, and the cascade of health problems that follow from both. If the rabbit begins to leave hay uneaten while finishing pellets quickly, reduce the pellet quantity until hay consumption rebounds.
Fresh vegetables form the third pillar of the adult diet, providing hydration, micronutrients, and dietary variety. Offer a daily salad of two to three leafy greens in a volume roughly equivalent to the rabbit's head size. Romaine lettuce, cilantro, parsley, dandelion greens, endive, and bok choy are all excellent choices. Introduce new vegetables one at a time and monitor the rabbit's stool for changes over the following 48 hours. Avoid or strictly limit high-oxalate greens such as spinach and high-sugar items such as carrots and fruit, which should be treated as occasional treats rather than dietary staples.
Fresh, clean water must be available at all times, ideally offered in a heavy ceramic crock that cannot be tipped. Some keepers use water bottles, which are convenient and reduce contamination, but studies suggest that rabbits tend to drink more from an open dish, which is preferable for overall hydration. Monitor water consumption patterns, as a sudden increase or decrease in drinking can be an early indicator of dental disease, kidney problems, or environmental stress. During warmer months, adding a second water source ensures that the rabbit never runs dry.