
First of all you show the dog on a lead that you AND the dag are happy on. I know that border collies used to have fine (normally silver) chains which is still ok. Half checks again are ok, black or white witha silver chain would be best, your you could go for a full leather black one or white one.
I have aussie shepherds which one has a black leather lead (black tri) one has a fine silver shain with a black lead (black tri) and one has a brown leather lead (red tri) They each have a lead that suits them best and which I also like.
Go for what your happy with because if yuo and the dog arn't comfortable then its no good!
Roxanne