Passing Object through intent, object can't be serializable

I have looked throughout Google and Stack Overflow and found that this should work when trying to pass an object through an Intent.

However I still get this error:

This doesn't make sense as multiple websites have said this should work. Also here is where I try to retrieve it:

Any help would be appreciated.

Solution

You can't cast your class to Serializable, you need to implement it in your class like this:

 class Horse implements Serializable{
    //Your code here
}