Mate theres always something that could go wrong when entering a terrier to ground, Everytime they enter we risk losing them its something you have to get your head round, its not a nice thought but it is the reality of terrier work.
well if your half hearted about it then dont bother, and i do worry, every time my dogs to ground, especially in a new earth, last time he was entered it all went silent, i felt sh!t!