(Oops forgot to hit post at the time – better late than never right?)
On BBC’s frozen planet (the one of infamous misleading polar bear shots) after flying over the Arctic with two helicopters David Attenborough commented that the polars bears that the scientists he was with had been tranquillizing every year seemed to be doing not so well. In the context of the show this was linked to change in the polars bears environment, but I can’t help wondering what studies have been done on the ling term effects of tranquillizing polar bears.
But nope surely can’t be that, no chance drugs could have side effects.
The one article I did find makes interesting reading.