Nulo Dog Food Review: High-Protein Formulas Tested
Nulo Pet Food entered the market in 2009 with a clear nutritional philosophy: dogs and cats are designed to thrive on diets rich in animal-based protein and low in carbohydrates. Founded by entrepreneur Michael Landa and formulated by Dr. Michael Kavanaugh, a veterinarian with extensive nutritional expertise, Nulo has grown from a small challenger brand into a widely available premium option.
Nulo’s dry dog food formulas typically contain 74-83% animal-based protein sources, significantly higher than the industry average. Their flagship line, Nulo Freestyle, includes grain-free and grain-inclusive options with protein content ranging from 27% to 37%. The Freestyle Turkey & Sweet Potato recipe, one of their most popular, features deboned turkey as the primary ingredient alongside turkey meal, chickpeas, and sweet potatoes.
The brand’s MedalSeries line offers a more affordable entry point while maintaining similar nutritional principles. These recipes contain slightly lower protein levels than the Freestyle line but still prioritize animal-based ingredients. The MedalSeries Chicken & Lentils recipe provides a balanced option for dogs with moderate activity levels.
Nulo distinguishes itself through its proprietary GanedenBC30 probiotic, a patented Bacillus coagulans strain that supports digestive health. Unlike many probiotics that die during the kibble baking process, GanedenBC30 is heat-stable and survives manufacturing, reaching the dog’s digestive system alive. Pet owners frequently report improvements in their dogs’ stool quality and digestive regularity after switching to Nulo.
The brand has also invested significantly in dental health research. Nulo’s kibble shape and size are designed to promote chewing, which can help reduce plaque buildup. Their dental-specific line, Nulo Dental, features a larger kibble with a texture designed to scrape teeth during chewing.
Nulo products are manufactured in the United States, with facilities in Texas and South Carolina. The brand sources ingredients from trusted global suppliers and conducts nutritional testing at each production stage. Nulo’s commitment to low-carb, high-protein nutrition has earned them praise from pet owners looking for biologically appropriate diets that mirror what canines would eat in the wild.
Common feedback from Nulo users includes improved muscle tone, healthier coat condition, and better appetite in picky eaters. Some owners note that the high protein content may not suit every dog, particularly those with certain kidney or liver conditions, and recommend veterinary consultation before transitioning to high-protein diets.