Cannot Feed Horse or incompletely eating

Horses feed on Apples, Golden Apples even Enchanted Golden Apples, Bread, Wheat and Carrot.

Bugs found here.
1. When Steve holding the Carrot and Enchanted Golden Apple, the horses head to the Steve but the 'Feed' word does not appear. Causes Steve cannot feed the horses.
2. While Steve feeds horses with the items that are not mentioned above, the horses cannot eat completely. We can hear the eating sound but the horses cannot eat what Steve holds.
Horses cause the phone to lag due to their movement.