How high of an energy level can I come to expect from my puppy? He's 3.5 months old now (and about 42 pounds). I hear they have higher energy levels than other work lines.
My Zefra is 18 months old and is only 1/2 Czech in her pedigree but temperament, drive, thresholds, personality... all Czech.
I have been told my some very well known Czech breeders who have watched her work (we do schH and agility) that in her work, you wouldn't know she wasn't fully Czech... lol.
Zefra is a HIGH HIGH energy, HIGH drive female with low-medium thresholds. She also has superb nerve and as she matures, she is able to cap (just a tad!) that with consistent training/corrections/redirection.
One thing to note is that this dog is EXTREMELY biddable and has IMPECCABLE focus - always has. She is also very versitile and can do anything I ask - and does it well! She is pretty much my dream dog.
She does have her issues, she is pretty sharp and if in protection, can be handler hard as well. She is also super friendly to a fault...lol. She acts more like a golden with people on the street and especially kids (I like it though). But she is a jumper and it's not something I have been able to correct (trust me, we have tried).
She is also SUPER quick and extremely agile.
She is worked everyday in some capacity, but we regularly train (Schutzhund) twice per week. This helps, but she is still unable to really settle in the house. Her 'settle' is laying with a ball chewing, or grabbing an antler or something), she has to be "doing something" while "relaxing".
I personally LOVE this about them, and am looking for my next working partner to be a full Czech dog. I just seem to be drawn to that line.
I don't expect Zefra to really change in regards to her energy or working ability until she physically can't do those things anymore.. lol.
This is my 1/2 Czech female: