Born last December, the bear ignited a heated debate about hand-rearing after his mother rejected him and he was brought up and bottle-fed by Mr Doerflein.
And in families where one child was breastfed while a sibling was bottle-fed, there was still a difference in their chances of social mobility, with the breastfed child 16% more likely to move up in class.
Those who had been breastfed had a 58% chance of moving up the social ladder compared to 50% of those who were bottle-fed - a relative difference of 41% when the statistics were adjusted to take into account other factors which might influence the outcome.