In a way, horses do look somewhat like big dogs. This Labrador sees these horses every day during his morning walk, and for some reason, he feels the need to bring them sticks and other “gifts” – in a dog’s eyes, sticks are the best gift anyone could get (well, after food probably), and the bigger, the better.
Perhaps he thinks they’re lonely and they could use his attention, or perhaps he sees them as some sort of “big dogs” and he thinks they would enjoy this gesture. Either way, he’s a good boy. Even if these horses have no idea what’s going on, the dog must feel pretty proud of himself.