Help needed with introducing my new horse to the field

[SNORKEY]

Hi, I brought my new gelding home yesterday, he's a 13.2hh 2 year old and put him out with my other gelding whos a 15.3hh 9 yr old,and usually friendly. They had the usual run around and when they calmed down I put our two mares out with them as well. They had another run around for a while and then when I thought they were settling down my older gelding pinned my new little chap against the fence biting down on his neck and looked like he was trying to kill him, I've never seen such aggression in a horse. My husband and I ran over and had to throw something at my gelding to get him off, as he just wouldn't let go, it was like a dog attacking another! and the new one was so scared he ran off and jumped over a barbed wire fence. Luckily not hurting himself!
I kept him seperated after that but I'm not really sure what to do now, I know my gelding is very attached to one of the mares, but I'm not sure if I want to risk just putting the two boys back on their own again!
Any thoughts anyone?

 

[zaminda]

We had a similar problem when we reintroduced my pony when he came back of loan. We had 4 mares and one gelding, and a serious herd thing going on. To be honest, it was months before they were all ok. We had to get the pony a friend, thankfully we had a welshie living with us at the time, and we put them in together. They only really settled a bit when we moved from having them on 3 acres to 15, although he was always treated as an interloper! I'd try havinghim in a pen in the field, we usually have it doubled taped so they cant talk to start with, then gradually make the 2 fences closer togther until they can talk over it and move from there. If your gelding is more attached to one mare than the other, you could always put the other mare in the pen with him after some time, and try and pair them up

 

[Meowy Catkin]

Put the youngster in with your kindest mare and put the other two in the next door paddock. If you only have one paddock, split it with an electric fence.

The chestnut on the left (with the dark bay mare) was a yearling being introduced to a herd of three girls (poor chap ). After a couple of weeks, they were so settled that I took the electric tape down and this was the result...

... nice and uneventful.

If they had been pulling faces at each other, I would have left the electric tape up for longer.

The grey (who had been bottom of the pecking order) has been slighly bossy with him but more often than not, it is those two that graze, stand or get into trouble together.

 

[SNORKEY]

Thanks, I put the kind mare out with him this morning and the other two in the other field wich is about 100ft away, the kind mare totally ignored my new boy and just paced at the gate for over an hour wanting to go in with the gelding and other mare, My older boy has the two mares wrapped around his hoof! lol
The new boy didn't seem to be bothered about being in on his own and he could see the others,so i put the mare back out with them.
Tonight I brought my gelding into ride and he and the new boy has a few squeals over the fence whilst i was grooming him, but he didn't seem too bad. I may leave it a few days and see if my gelding will be ok on his own in the field with him.

 

[1Lucie]

To begin with when i got my boy i put him in the field alone, while the other horses (3 mares,1 gelding)were in the field immediatly next to him (with post and rail fence between them). There was alot of squeling over the fence but eventually it calmed down.

I then put my boy in the field with the others. My boy ended up with a few minor injuries but nothing to terrible and they are all the best of friends now!

 

[BonneMaman]

You might need to seperate the mares and geldings. Sounds like the agressive gelding has had the mares to himself and does not want to share. They will settle down though so don't stress too much.