There are signs, however, that Spaniards are no longer willing to tolerate the cruel deaths suffered by greyhounds. Last week protesters delivered a petition signed by 50,000 people to the environment ministry in Madrid demanding that the practice be outlawed. Measures being demanded include the registering of ownership of each dog, and the implantation of identity chips so that any animal found abandoned or killed can be identified and the owner contacted.
Ministry officials showed their support but, under Spain's system of devolved powers, it is regional governments and town halls that must enforce the law.
'Unfortunately, on a local level, the politicians are sometimes the same people who hunt with the dogs,' said Sorde.
Popular outrage, however, continues to grow. 'Ordinary people are beginning to react,' says Sorde. 'We have heard cases of hunters out with greyhounds who are being confronted by people shouting "murderers".'
That does not mean, however, that the killings have stopped. Every hunting season the hunters - some of whom breed dozens of dogs a year - choose which greyhounds they want to get rid of. That is the moment campaigners fear most. 'The worst thing is when we find several dogs hung together in clumps of pine trees,' said Sorde.