Get the horses attention and whistle. If it comes over offer an apple or a treat. Only offer the treats immediately after the whistle to reinforce the positive behavior. The horse will soon learn that a whistle means treats. Do not treat the horse unless you whistle.
Laocoon
You could try to whistle to the horse, many will listen to a whistle. If not you may have to go in and get the hose yourself. You should have a halter and a lead rope, but be careful when approaching a horse in a open area as they may run away or fight back against being caught.
push up on the dpad to whistle for your horse
The tin whistle originated in Europe
The Trojan whistleblower was Laocoon. He was the Trojan that was not fooled by the "gift horse," so he tried to blow his whistle as a warning to his fellow Trojans that it was a trap. It was ignored, and the Trojan Horse led to the fall of Troy.
Go up to the fence at the stable then it says whistle A then press the A button on your DS
You call your horse in RDR by using the game's whistle function. If your horse is dead, you'll need to wait until a situation presents itself where you can get another one, or wait a while until it regenerates and you can whistle for it again.
Come in to the Pig and Whistle
Whenever you feel ready to do so or whenever you want to.
Practice practice practice...
Whistle and I'll Come to You - 2010 TV is rated/received certificates of: UK:12
They make a small whistle like neigh