Hand Feeding fox cubs at work

The night security guard said a family of fox cubs would take food from your hand. I had to try it of course so I went back one evening armed with a pack of Asda value ham and a pack of party sausages and this is what happened. The mother sat outside the whole time sending the cubs in but didnt come in. Please dont complain about encouraging pests and vermin as it was just a bit of fun.