Good one. You know I've never tried him with hot chocolate.Well you can offer him dark chocolate if he still craves it:
http://www.scientificamerican.com/article/why-is-dark-chocolate-good-for-you-thank-your-microbes/
Nice link Claudilla, I hope it gains momentum. I've only just had a little look but I'll have a proper look tonight.Here is a link to the UK Iris Project..an excellent enterprise: http://irisproject.org.uk/index.php/resources