From their website (http://navarrsotillo.com/index.php/es/nuestros-vinos as of September 21 2016)
"Todos ellos son aptos para Veganos" [All of them are suitable for vegans]
Bodegas Navarrsotillo
Vegan
The one product listed is vegan friendly.
Products (1)
What the company told us
Correspondence on record, with the date of each entry.