Complex sentence: Touching its face when it is hunting will make it react angrily and most likely attempt to "attack" the person touching it, but if it is feeling playful, it will nuzzle the person's hand, and then "attack".
Split into simpler sentences: Touching its face when it is hunting will make it react angrily and most likely attempt to "attack" the person touching it. But if it is feeling playful, it will nuzzle the person's hand and then "attack".