Check for cultural references to ensure accuracy. Since it's in Portuguese, maybe include elements common in Portuguese storytelling, like naming the horse with typical names or incorporating local settings. But not necessary unless specified.
It was then that her father noticed the change—not just in Céu, who began to eat more and groom his coat, but in Luna. She no longer flinched at loud noises; instead, she’d explain, "They’re just like thunder. Come and go."
I should also make sure to include elements that are educational, like how to safely interact with horses, the importance of trust in animal relationships, or the therapeutic effects of animal companionship. The story should be engaging for readers interested in animals and children's growth.
Over weeks, a rhythm formed. Luna learned to interpret Céu’s body language: the flick of an ear meant caution; a twitched tail, boredom. She discovered that he preferred hay in the morning and could count to three by stomping his hoof. Céu, in turn, began to mirror her songs, a soft whinny accompanying her lullabies. Villagers chuckled when they saw her "talking" to him, but the bond was undeniable.