Sorry to hear the news Bob.
I had a black lab too, her name was Lucy.. They are a wonderful dog. She was a gentle giant. I remember a couple occasions she got porcupine quills in her face and mouth. I pinned her down, actually straddled her then covered her eyes with one hand while I grabbed a quill with a pair of pliers. She would flinch and yank the quill out as I held onto it. But She never bit me. How impressive is that?? Almost like she knew I was helping her. She was a sweet dog..