I've been nipped a couple of times by one of my piggies. Before I stroke or handle them, they usually like to sniff me first, so I let them have a sniff of my hand. She didn't bite very hard. No blood was drawn. I think she might have thought I had food for her. I'd washed my hands so there wouldn't have been any trace of food smells. They didn't seem to be agressive nips and she let me handle her no problem afterwards. I wonder, does anyone else get this with their piggies?