Researchers aren't the only ones who concern themselves with animal welfare in the lab. Vets are asked regularly to monitor and care for these animals - a role that can call for some difficult decsions. Kerri Smith talks to Sarah Wolfensohn, head of veterinary services at the University of Oxford, UK, about the challenges and conflicts presented by caring for experimental animals.
Primate researchers have long faced violent protests over their work. But in some countries, regulatory obstacles are taking a greater toll. David Cyranoski meets European scientists who feel that bureaucratic pressures are closing their labs.
Use of animals for testing early in the drug-development process aims to provide vital information to make new drugs safe and effective - and the process is being constantly refined. Hannah Hoag finds out what is involved.