James glanced over at Padfoot as they raced, though it made his movements a bit more awkward. Though he still looked bone thin, he was moving far easier. He was running and if you ignored the way that he looked so damned neglected, you could forget for a moment what Sirius had been through. That was James's goal, to make Sirius forget, to help Lily fatten him up and heal him and get him as close to the old Padfoot as was possible.
Prongs darted out of the straight line of a race to circle around the running dog. He was trying to head him off, to meet him face to face so that he could paw at the ground with his hooves and pretend as though he was going to paw at the dog. He wouldn't, of course, Sirius was far too ill as it was and delicate, but it was an old, well loved, familiar game.