New US television reality star Heather Mills could be charged with trespassing after breaking into a pig farm to highlight animal cruelty.

Heather led a team of activists from the vegetarian group Viva! in a raid on Somerset’s Bridgewater Farm, two weeks ago.

The group filmed their break-in to expose the “cruel conditions” the animals live in.

The “Dancing With The Stars” star says she has done nothing illegal. Michael Underhill, claims the stunt has made his pigs sick because they were exposed to a disease brought onto his property by the campaigners.

He is also threatening to take legal action against the group for trespassing.

Heath’s group targeted Bridgewater Farm because of the owner’s use of farrowing crates - narrow pens used to house sows while they give birth and nurture their piglets.