They were agreed after research found that many birds were currently still conscious when their throats were slit.
However, Muslim leaders said there was a risk that a stronger current could kill the animals before the ritual slaughter – meaning they would no longer be halal.
Speaking to the Daily Mail, British Veterinary Association president Robin Hargreaves, who campaigns for better conditions in abattoirs, said: “Failure to implement the new regulations risks a percentage of chickens being ineffectively stunned, thus compromising animal welfare.”
A spokesman for the Compassion in World Farming pressure group said the decision meant thousands of chickens could daily be enduring ‘horrific’ deaths.
Halal producers had been planning a judicial review to halt the new legislation before it was unexpectedly dropped.
A Department for Environment spokesman said: “We realised that our regulations might have unintended consequences in that they could limit religious freedoms.
“This is a complex area and we need to get it right.”
He said that “robust” regulations about animal welfare remained in place.
Originally Published on http://www.express.co.uk