Choosing The Right Prong Collar
2.25mm (top) and 3.0mm (bottom) with backup strap between them.
These are three prong collars that I do NOT use. The metal ones have a quick-release clip.
Ring Size May Vary
Even if you order a non quick-release 3.0mm Herm Sprenger prong collar, you may not get the one I like. There is a version of the collar that is still a 3.0mm, but has a larger ring and larger links on the chain. The larger links make the collar operation much less smooth. It can be very difficult to tell which collar you are ordering, even if the website has the right picture, which is not always the case. Often if it is listed as a 3.0mm and 16″, it is more likely to be the correct ring size. On some websites they are listed as a 3.0mm and 18″ and that may be more likely to be the larger ring version. I have purchased the newer ones with the description “Herm Sprenger Ultra-Plus 3.0mm Dog Prong Training Collar” and those are usually the right ring size as well.
See my image on the left below which shows the larger ring and smaller ring versions of the 3.0mm prong. It is not easy to tell the difference, even in this image. For this reason I only order prong collars from suppliers I have used in the past. I used to get them from Chewy and gotpetsupplies.com. Since the pandemic started, both have been out of stock. See the image below on the right of the Chewy listing. It looks like they do have the collar I like in stock at Pets Warehouse here and I believe I have ordered from them in the past and this is the collar I like.
Two 3.0mm Herm Sprenger prong collars with different size rings.