New Horse,Running Himself around the feild! HELP please!!

I just got a new horse,he is a 5 Y/O OTTB/Former Hunt Horse,he is the sweetest horse to ride and be around,great manners in the barn and his stall.We first turned him out alone and my other two horses in the field next to him,they fought a little bit and then it seemed like they were getting along great I did this for 2 days. I have a 6y/o OTTB and a 13Y/O ottb.I opened the gates between the two fields today,and they were fine untill about 5 hours later,all of a sudden Crew my 5 year old,is scared to death of Pete(the 13 year old.) he wont even go near him,Pete hasnt done anything to him and the mare just stands there,he was running around the entire field working himself in a lather today.Pete was in the feild and he woudnt even go near the fence!! Can anyone help me out here before tomorrow?! I let him in the stall after we cooled down,and he acted like nothing happenend. This horse is so much better then this,and I have no idea whats going on.

I think you need to find out if it is Pete or the fence that got him worked up. I would take him out with the halter and walk him all around the paddock without the other horses being there. If he is fine, can you leave him in there and put the others in the other paddock? Try that. Then try Crew with the mare only for a week or two. Then Crew and Pete only. Then all three together. 2 days may not have been enough time. Some personalities take longer to mesh than others, plus you don't know for sure what got him all worked up. Could be that Pete really did do something and you just didn't see it. Could be that Crew smacked himself on the fence and scared himself. Could be that there was a scarey tarp 5 miles down the road that freaked him out!LOL We can't always know, so it becomes a process of elimination and patience.
Good luck.

Let him be himself in the pasture. If he wants to run untill he is tired let him. As long as he's not going to run through a fence I don't see the problem. He will eventually become accustomed to whatever is bothering him and he'll quiet down.

I'm with kevinshorses. Horses will be horses, he'll get over it. =]

I would want to know what is bothering him to aid in future training and work if possible. Sometimes though, you never find out. Also, having had two horses suffer traumatic, fatal injuries due to personality clashes, I make sure I know what the herd dynamics are before turnout.

Maybe it's nothing, but then again... maybe it's something. I side with caution.

I wouldn't put them all together yet .. give them a week or two next to each other but in different paddocks before you put them together. Then maybe just introduce the mare first .. let them be together for a week or so and then introduce the other gelding ... also if you have an even number of horses that is better so that they can buddy up :)

I am not sure how long you have had everyone, but I like to pen horses next to each other no less than 2-3 weeks before turning them out together. Sometimes depending on personalities, and ages, you can do it sooner, but I still only do gradual turnout time, before 'full turnout' together, mainly so that I am hopefully out there to notice any scraps that might happen, and stop any major things if they should arise. I may be over protective, but I also generally never have much arguing or herd fights when I turn out a new horse into a herd...sooo...