We had a Vizsla we got as a rescue, and had her from one to 13 when we had to put her down. She was a good dog, but we think she had been abused by her first owners, and had some fear biting issues as a result.
I'd recommend the breed, but 1) they are called "velcro dog" for a reason. They want to be at your side always. She never ran away when we were around, and would chase deer and rabbits in the woods/park, but would always come back in 15 seconds when we were out of sight. We even made a hide and seek game out of it.
They tend to have separation anxiety, worst than most dogs. We were lucky, but many don't now what to do with themselves when they are alone. I don't know if a companion dog (your lab) would help or not. Ours would counter-cruise and became exceptionally food focused.
Ours had many health issues in her last 2 years--wound up on prednasone (sp).
She was a good and loyal dog, and I missed her terribly when we had to put her down. We have a 4 year old lab/chow mix now. This isn't her, but our current dog looks something like this: