OK, had to check the ingredients on my hidden bag of cadburys.... no oxblood listed in the ingredients, just milk as the only animal product. And after several years of advanced chemistry and biology courses, I know every scientific name for "oxblood." LOL.
Did you know Cadbury's in the US is manufactured by Hersheys?
Phew! no blood in chocolate.
Yes when I saw the Cadbury's mini eggs in a grocery store where I live, I had to grab a packet (I from the UK so I was curious). I read the ingredients (USA version has more than the UK version) plus I saw it was made by Hersheys.
Someone I know has a friend who works for Cadbury's USA and said that although Cadbury's make yummy chocolate, unfortunately because the USA chocolates are made with American ingredients, it doesn't taste as good as the UK version.