Pros and cons? My 70ish pound GSD has out grown his 2.25 weight wise. He responds well on the 2.25. I had a 3.2 handy but noticed he doesn’t respond as well on it. I’m looking at the 3.0 gauge but saw they have a 3.0 short link that’s supposed to be similar to the 2.25 because it has more prongs...