The correct show lead for a Border Terrier is a plain leather slip lead, the bottom of the lead is the slip part with an adjustable stopper and it joins the top bit that you hold. You shouldn't use a lead and collar.
Don't want to put you off, but I showed my BT bitch at the same age at one of the area breed club shows and all I can say is never again. All the other puppies were incredibly well behaved, they were all immaculately stripped out, they all stood like statues and definitely no one licked the...
I have two Border Terriers and my dog has an Oxcroft Dad. There is loads I could tell you about BT's, mostly good! YES definitely go to puppy training classes, its essential for socialisation, Borders are generally good with other dogs but some can be a little sharp so start early. I don't want...