Burns Senior+ Chicken & Brown Rice Dog Food. Your dog is never too old to start eating well. An exciting new product from Burns Pet Nutrition promotes healthy ageing for dogs who need a little extra care as they reach their golden years. The new Senior+ range is healthy, tasty and contains ingredients that are formulated as an ideal diet for senior dogs of any breed or size. Containing special ingredients such as green tea extract and salmon oil, this diet can help maintain healthy joints, mobility and good cognitive function, making it perfect for dogs who want to live well at any age.