Using an item's array index to look up data in the array?

Currently, I use the horse name to lookup data in the myHorses array. However, the app won't if the user uses the same name for multiple horses. Is it possible to use the array index instead? I want the app to create a stack of buttons equal to the number of horses created, then set the title for button one as the name of the horse at index [0], then the next button with the name of the horse at index [1] etc for all horses. Then when the user presses a button, the app uses the index instead of the name to lookup data for that horse. Not sure how to do this in practice

Thanks in advance for any tips :)

model

Code Block 
var myHorses = [
    Horse(name: "Donnerhall", idNumber: 1",
	  Horse(name: "Mischa", idNumber: 2"
	]
	func countHorses() -> Int {
	    myHorses.count
	}
	  var horseNumber = countHorses()
    var currentHorse = myHorses[0]

view controller 1

Code Block 
import UIKit
class HerdViewController: UIViewController {
    //Buttons stack
        for horse in myHorses {
            let button = UIButton()
            button.addTarget(self, action: #selector(self.lookupHorse(sender:)), for: .touchUpInside)
            button.setTitle(horse.name, for: UIControl.State.normal)
            buttonsStack.addArrangedSubview(button)
         }
         buttonsStack.translatesAutoresizingMaskIntoConstraints = false
    }
//change currentHorse var and segue to horse viewer
    @objc func lookupHorse(sender: UIButton){
        currentHorse = myHorses[1] //I put in the index for horse 2, but I want the app to figure this out based on the button pressed 
        let horseName = sender.title(for: .normal)
            if let theHorse = myHorses.first(where: {$0.name == horseName}) 
                }
	performSegue(withIdentifier: "horseViewerSegue", sender: self)
    }
}

VC 2

Code Block import UIKit
class HorseViewController: UIViewController {
override func viewDidLoad() {
        super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
        horseNameOutlet.text = currentHorse.name
	     	horseIdOutlet.text = currentHorse.idNumber
}

Code Block 
    //...
        for horseIndex in myHorses.indices { //<-
            let horse = myHorses[horseIndex] //<-
            let button = UIButton()
            button.tag = horseIndex //<-
            button.addTarget(self, action: #selector(self.lookupHorse(sender:)), for: .touchUpInside)
            button.setTitle(horse.name, for: UIControl.State.normal)
            buttonsStack.addArrangedSubview(button)
        }
    //...
    @objc func lookupHorse(sender: UIButton) {
        let index = sender.tag
        currentHorse = myHorses[index]
        //...
        performSegue(withIdentifier: "horseViewerSegue", sender: self)
    }