A German Rex in its prime adult years, spanning roughly from one year through approximately ten years of age, requires a balanced diet that sustains energy and lean muscle without encouraging excess weight gain. The transition from kitten food to adult formula should be completed by twelve months, shifting to a product that provides moderate protein levels from high-quality animal sources, appropriate fat content for an active breed, and essential micronutrients including taurine, arachidonic acid, and preformed vitamin A that cats cannot synthesize on their own.
Feeding measured meals twice daily is the most reliable approach for maintaining a healthy body condition in the German Rex. This breed tends to be active and food-motivated, a combination that can lead to weight gain if portions are not controlled. Use the feeding guidelines on the product label as a starting point, then adjust up or down based on your individual cat's body condition score. A healthy German Rex should have a visible waist when viewed from above and ribs that can be felt without pressing through a thick layer of fat. The breed's fine, close-lying coat makes body condition relatively easy to assess visually compared to cats with long or dense fur.
Fresh, clean water must be available at all times. Many German Rex cats demonstrate a preference for flowing water, making pet fountains a worthwhile investment. Adequate hydration supports kidney health, urinary tract function, and digestion. If your cat eats primarily dry food, supplementing with wet food several times a week increases total moisture intake and reduces the concentration of the urine, which may lower the risk of urinary crystal and stone formation over the long term.
Treats should comprise no more than ten percent of the daily caloric intake. Use treats strategically as training reinforcement or enrichment rather than as a constant supplement. Avoid feeding table scraps, as many common human foods contain ingredients that are toxic to cats, including onions, garlic, grapes, and chocolate. If you choose to offer commercial treats, select products that are low in sodium and free of artificial preservatives, and factor their caloric contribution into the daily feeding plan.