By right-clicking on a sitting down tame dog(wolf.)
Nope, if you want the dog to sit, just right click them.
Minecraft Pup
There are no horses in Minecraft. If you are referring to dogs and cats you right click them to make them sit or follow you around.
Without mods, you can't.
Sit
Black Lab
The opposite position of sit is "stand."
let it sit then push it in the minecart.
minecraft
give it a bone
After you have tamed it, right click. It should sit down until you tell it to stand up.
by telling him to sit