As a novice teamster, I wanted Brown Swiss for their slow attitudes. I ended up with Jersey crosses, who are very bright, willing and energetic. From what I’ve read and seen in 4H teams, Holsteins are a good choice as they are tractable and plentiful(cheap).
Look for straight backs, strong legs well placed. Check for umbilcal hernias, runny eyes. They probably will be skittish but shouldn’t be crazy wild. Look for someone who’s alert, curious and active.
oxnun