THINK
The user wants a Portuguese to Spanish (Spain) translation.
The source text is "Pele de cavalo."
"Pele" means "skin" or "hide".
"de cavalo" means "of horse" or "horse's".
In the context of pet products, especially if it's an ingredient or a chew, "pele de cavalo" refers to horse hide or horse skin.
Spanish equivalents:
"Piel" is the most common word for "skin" in Spanish.
"Cuero" is used for processed animal skin, like leather, but can also refer to the raw hide in some contexts.
"Piel de caballo" is the direct and most natural translation for "horse skin" or "horse hide".
"Cuero de caballo" would imply processed leather, which might not be the intent if it's a chew or raw ingredient. Given the context of pet products, "piel de caballo" is more likely to refer to the raw or minimally processed skin/hide used for chews or treats.
Therefore, "Piel de caballo" is the most accurate and natural translation.Piel de caballo.