Standard Gray Chinchillas require carefully managed diets that closely mirror their natural forage in the harsh Andes Mountains, where they consumed fibrous grasses, seeds, and sparse vegetation. Their digestive systems evolved for high-fiber, low-fat nutrition, making them extremely sensitive to dietary errors that can quickly cause serious, even fatal, health problems. Understanding and maintaining proper chinchilla nutrition is one of the most challenging and critical aspects of their care.
High-quality grass hay, specifically timothy hay or orchard grass hay, must form the absolute foundation of a chinchilla's diet, available in unlimited quantities 24/7. Hay provides the essential fiber necessary for proper digestive function and helps wear down constantly growing teeth. Chinchillas should consume a pile of hay equivalent to their body size daily. Fresh hay should be provided daily in hay racks or hay feeders that keep it clean and off the floor. Alfalfa hay is too high in protein and calcium for adult chinchillas and should only be given to young, growing chinchillas under six months old or nursing mothers.
Chinchilla-specific pellets supplement the hay-based diet, providing concentrated nutrition in controlled portions. Quality pellets should contain high fiber (18-20% minimum), moderate protein (16-20%), and minimal fat (2-4% maximum). Feed approximately 1-2 tablespoons of pellets per chinchilla daily. Choose plain pellets without colored pieces, dried fruit, nuts, or seeds, as these additions are typically unhealthy treats disguised as nutrition. Many popular "gourmet" chinchilla foods contain inappropriate ingredients that cause obesity and digestive upset. Stick with simple, high-quality pellets from reputable brands like Oxbow or Mazuri.
Treats must be given extremely sparingly and carefully selected. Safe treats include small pieces of dried herbs (rose hips, hibiscus flowers, dandelion), occasional plain Cheerios (one per day maximum), or tiny pieces of dried apple or papaya (one small piece weekly). Never feed sugary treats, nuts, seeds, fresh fruit beyond minimal amounts, vegetables except occasionally, or commercially marketed treat mixes containing unsafe ingredients. Raisins, once commonly recommended, are now recognized as too high in sugar and should be avoided. The general rule: treats should comprise less than 5% of daily calories—essentially, chinchillas need almost no treats.
Fresh, clean water must be available at all times through sipper bottles rather than bowls, which can become contaminated or tip over. Check and refill bottles daily, and clean them thoroughly weekly with bottle brushes to prevent bacterial growth. Change water daily even if bottles appear full, as chinchillas can backwash food particles into bottles.
Dietary mistakes cause severe health problems in chinchillas. Their delicate digestive systems contain specialized bacteria that break down fibrous foods through fermentation, similar to horses or rabbits. Any sudden diet changes, inappropriate foods high in sugar or fat, or insufficient fiber disrupts this bacterial balance, causing potentially fatal digestive slowdowns, bloat, or diarrhea. Signs of digestive problems include reduced fecal output, soft or misshapen droppings, loss of appetite, hunched posture, or lethargy. These situations require immediate veterinary attention. Prevention through strict dietary discipline is far easier than treating digestive emergencies, which have poor success rates even with aggressive veterinary intervention.