Posted: Thu May 2, 2019 2:52pm
Steve, for the definitive answer to your question go to the N332 website run by the Guardia Civil, access the Spanish Traffic Laws manual page 71 transporting animals in a vehicle.
The book of the Spanish Traffic Laws, all 522 pages, is available to read or download for free.
The website is designed by the Guardia Civil for English drivers.
It gives clear precise guides to the regulations including photo examples.
The contents of the 552 pages can be amazing and in some cases contradict what normal English drivers "assume" would be the rules often leading to big fines for an offence.
I am always amazed that ex pats drive round Spain without learning the contents of this book which sometimes contradict one's expected knowledge of the UK driving rules.
Trust this helps you and many others.
Regards Al
PS you can register on this site and get daily news from the Guardia Civil on traffic problems as they occur, news and updates.