What a cutie! I like the name 'pickles'. Something with 2 sylables is easiest for the dog.
You might consider letting him spend some time in the vacinity of the chickens every day so that they can see him and learn that he's part of your 'flock'. IMO, the next 6 wks of his life is all about love and play and bonding. When he is 3 months old, his brain is quite developed- enough to start training. We used to train our own black labs for hunting and they were voice and whistle trained to sit, stay, come and retrieve when they were 4 months old. You'll thank yourselves if you start at 3 months, ,it doesn't take long. When he is grown, his very presence will ward off lots of predator threats. But for now, just love him...lots....