The apple head and deer head Chihuahuas have different-shaped heads and unique health issues. However, their temperament and care needs are not affected by their head shape. It's important for prospective owners to be aware of these differences. Ultimately, both types make great family pets who will bring joy and memories for years to come. So, whether you prefer the rounder forehead of the apple head or the deer-like head of the deer head, rest assured that you'll have a lovable companion by your side.