Belle has the most solid down I have ever seen. She will hold it forever and in any circumstance (at least that we have tried or encountered). She has been like that since about 6 months. She even had a Newfie break a down next to her in the ring, go over to her and try to get her to play and she held. The Newfie even tried to climb on her. I was very proud of her. She was looking at me like do something mom.
Halo is almost their, but it took allot longer with her. And we had a major setback about a year ago when someone threw a clipboard and it landed right by her. It took me about 3 months to recover from that as she kept expecting a clipboard to fly out of no where at her and any sound would make her break. I went all the way back to ground zero and built the down back up with her. If actually was a blessing in many ways as she is not much more solid than before.
Ringo has been really good and early would hold a down longer than he will now. But still very good for a pup. His biggest challenge right now is that everything is so darn interesting. He will hold the down,but his attention is everywhere.