Make sure everything your dog needs is easily accessible so they don?t have to go too far to find their water, food, toys and bed. Smooth, slippery floors can be difficult for older dogs to walk on, so put a rug or carpet down to give them something to grip. Feeding a senior dog. As they get older a dog?s dietary requirements change. It varies with breed and size, but at around seven your dog might benefit from gradually moving onto a diet designed for senior dogs.