In the study, feeding police dogs with fish-based foods showed positive effects on their health. The researchers looked at how these foods can impact the fats and oxidative stress levels in the dogs' bodies. They found that the dogs' blood sugar, cholesterol levels, and markers of oxidation improved after eating the fish-based diet. The fats from the fish also helped in reducing inflammation and stress caused by intense training. The dogs' bodies showed better levels of helpful fats from the fish food, suggesting that their diets can play a crucial role in their overall health, especially during strenuous activities.