Welfarists and conservation biologists argue over whether, for example, a specific project needs to be put on hold until animal suffering is eliminated, or that a project needs to be terminated if this is not possible.

FORBES: Compassionate Conservation: A Discussion from the Frontlines With Dr. Marc Bekoff

Pits have been prepared to hold up to 180, 000 animal carcasses - with space to hold a further 180, 000 at the site.

BBC: News Online

But for the clinical translation of this technique, one would want to know whether the observations made with animal cells would also hold for human cells.

FORBES: Nuclear Transfer Breakthrough Offers A Way To Prevent Mitochondrial Disorders

Ms Bond told the court she had seen the animal's minder trying in vain to hold on to him before the horse broke away.

BBC: Carole Jane Bullett inquest told of 'agitated' horse

Further trials of this compound are on hold because the drug caused cardiac toxicity at high doses in animal tests.

FORBES: Magazine Article

Anyone responsible for a travelling circus that uses wild animals in a performance will need to hold a valid licence, meet welfare standards and have a retirement plan for each animal.

BBC: Wild animals to be banned from circuses