on the zoo website: TV Chimps and Twycross 50 years on
Thanks, I'd googled but didn't find it.
A large part of the reason that chimps like Choppers have taken so long to become part of a group is surely down more to the fact they were kept in twos all these years and didn't have the opportunity to be part of a larger group, than to the severity of the damage caused their early experiences. Monkey World have shown that damaged chimps, especially females, can become part of a group fairly quickly, although I think on the whole the ones who are more badly treated integrate better than the ones who have been treated with kindness as little humans.
My consolation about loving those PG Tips adverts is that the chimps were not 'trained' in the ruthless, spirit-breaking way that is used with American chimps which are STILL bred for the entertainment industry.