The Halti link has been designed by Dr Roger Mugford to use when a
Halti is first worn, or as a permanent accessory with over boisterous
or aggressive dogs.

Some dogs take time to get used to the Halti and there is a small
risk that they may be able to back out of the headcollar, pulling it
over their head just as with a slack conventional collar.

This link attaches the Halti to the D-ring of a conventional collar.

The Halti link is available in two sizes: small for Halti sizes 0-2 and
large for Halti sizes 3-5.