There are frequently stories of animal cruelty in the press and on social networks, with frequent confusion as to the correct course of action. Those who witness abuse can call the local police who are under the jurisdiction of ayuntamientos, so operate on a municipal level. More effectively, however, anyone who witnesses animal mistreatment should call Seprona.
Seprona is the Guardia Civil’s Servicio de Protección de la Naturaleza, so the official police route for environmental issues of any sort, including animal welfare. Just call the central 062 number and explain it’s an animal welfare issue, tell them where you are, where the offence occurred, and they will forward you to the correct local contact. There are frequent rumours that Seprona is only concerned with non-domestic animals. These are incorrect, and the Guardia Civil themselves say that cases of animal mistreatment should be denounced without hesitation to 062.