Some of the dogs rescued in the Guardia Civil operation.
Arrests were made in Palma on Thursday.
Discovery of the animals came as part of a drugs investigation.
The Balearics Animal Welfare Law it was issued nearly 30 years ago and needs to be updated.
For now the group will continue to feed the sheep.
Restriction of the numbers of pets per household is expected to be scrapped under new bylaw.
The startling story of the week was the arrest of Tolo Cursach. In Palma they were agonising over foreign property buyers and holiday rentals. The government made another announcement about Son Dureta. And animal-welfare stories concerned the Pollensa cockerel and the bull of Fornalutx.
"The purchasing of animals is cruel and fosters a business of mistreatment of animals."
Almost inevitably Magalluf hit the news for the wrong reasons, Puerto Pollensa grabbed the headlines in a way no one would have hoped and animal welfare was high on the agenda.
The aims are to arrive at improved actions to protect animals in urban environments and to ensure greater compliance with existing legislation.
This is further evidence that bullfighting is on the way out – especially as opposition is even higher among young people.
The number of animals admitted to the Son Reus centre for animal protection has, in recent years, been in decline, but in 2015 the number of dogs went up.