The killing of thousands of animals which have been bred for research, including 40,000 in a year by one New Zealand university, has been questioned as part of Government reforms of animal welfare rules.
A Parliamentary select committee was told yesterday that scientific institutions were over-breeding animals, in particular rats and mice, and many were being disposed of without even being used in testing.
The National Animal Ethics Advisory Committee, an independent advisor to the Ministry for Primary Industries, said that there was no pressure to reduce the number of animals which were bred.
Chair Virginia William said: "They often breed a lot more than are ever needed and these animals are just killed. The one estimate we got from an estimate was something over 40,000 animals were just bred and never used."
She added: "We think it's quite high. At the moment, there's no ethical oversight of that. And if there was some oversight then it might put pressure on them not to over-breed quite so much."