Almost 1,000 people have signed a petition calling on Kirklees Council to stop serving schoolchildren halal meat from animals which were not stunned before slaughter.
The council has admitted 40 schools in the area were serving the meat in school dinners.
Huge debate was provoked locally - and the petition has gathered 986 signatures within 24 hours.
Petition founder Aleksandar Lukic posted: "Every day children in Kirklees schools are served meat from animals that have been slaughtered while fully conscious, suffering unnecessary pain and distress.
"It is a legal requirement that animals must be humanely stunned before slaughter, but non-stun slaughter is still permitted for some religious communities. The RSPCA says 'For slaughter to be humane, it's essential that animals are effectively stunned.'