A Freedom of Information request from The Mirror has revealed pigs are being blown up by the military as part of research into battlefield injuries.
In 2010, 21 pigs were reportedly blown up, with 37 killed in 2011 and 57 in 2012.
"The UK military's involvement in these cruel and archaic exercises is impossible to justify medically, ethically or educationally."
The Ministry of Defence has responded to the FOI revelations by saying the research conducted using the pigs has been vital and lead to numerous medical breakthroughs.
"The research we undertake saves lives by helping us develop world class protective equipment and new medical treatments that benefit both troops and civilians," the MoD said in a statement.