Have a buck goat who is more wild than tame, any suggestions??

Hi there,
I am somewhat new to having goats and have had my 2 female Nigerian Dwarf goats since last year. They have been a joy as I let them free range on the acre I have. I'm in the process of building their own area so I can have a garden since they eat everything in sight. My daughter and I have been talking about kid goats for some time. I was gonna find a buck to mate with one of my girls but then saw this ad on craigslist for this 2 year old buck Nigerian Dwarf Jester who was so handsome. I met him and with many conversations decided to get him. The owner informed me he was a sweetheart but skittish. When I picked him up last night, it was like a rodeo getting him in the trailer. He was taken away from his 3 girls, 2 kids and 4 horses he was corralled up with. We got home and let him out while he checked the place out. He eventually saw my 2 girls and it was game on. One of my girls let him approached until he started getting rough, stomping his feet making huffing noises. The other girl just runs not letting him near. We eventually introduced him to our dog who is just as tall as him weighing 120 lbs, well Jester took on my dog Moose and after that would be huffing and stomping his feet at Moose even when not looking at Jester. I felt Jester was doing the same to me. Now I am nervous as he is showing his dominance. I need to finish the fencing today. Does anyone have any suggestions about how to handle this guy? This may have been premature of me to get him, I really did think he was more tame than he actually is.