This is interesting. I did a search of the definition of Nutrigenomics and found that on the Purina site:
Nestlé PURINA is one of only a few companies in the world to use molecular and functional genetics to help understand the "why" behind dog health and nutrition.
Nestlé PURINA use Nutrigenomics (the study of the effects of foods and food constituents on gene expression) to focus on identifying and understanding molecular-level interaction between nutrients and other dietary bioactives with the genome.
Nestlé Purina scientists use molecular nutrition to identify gene-expression changes related to specific health conditions and examine how nutrition can help manage canine health. Whether scientists are studying the nutritional management of obesity, joint conditions, or food allergies, molecular nutrition helps them to fully understand the biological context of certain changes and how they can be used in order to benefit dogs. Our goal is to impact the processes through nutrition.
For further information download the attached document for an article entitled "Osteoarthritis and its origins: Disease development at the cellular and molecular level" In the study outlined in this article, Nestlé PURINA scientists used gene array technology to look at changes in canine chondrocytes. Molecular and functional genetics used in this study helped them understand the "why" behind canine osteoarthritis.