Labs and Swampcollie, PLEASE read the rulebook. Not just parts of it. A slipline IS allowed in Junior per the RULEBOOK! NOWHERE does it state that in Junior, you need to hide the slipline. I can't believe that so many people keep making up rules that don't exist.
If you don't want to read the rulebook, then contact the AKC rep. that helped write the rulebook. Maybe Jerry can convince you.