I do not know the circumstances of the images as I have not been there and only know what the article presented, but pictures can be misleading without more insight. As an example, people restrain dogs using much less humane restrains than those monkeys daily see pronged collars.
It’s clear from the photos and quotes they chose that they’re trying to make this sound far worse than it probably is. All of the quotes are from people against the very idea of animal testing who would throw a fit even if things were being done as humanely as possible. There is no context given for any of the photos
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