multiple iguanas

Question
i currently have 4 iguanas that live loose in a room. they are 4+ feet. I just adopted 2 more, slightly smaller ones.  one of the new ones is in a cage with the old timers visible to eachother. when they were initially introduced, one of the bigger ones immediately bit it aggressively on the back of the neck.  i separated them and now they are in the same room with the new one in the cage. how do I get them to get along?

Answer
Hello Nancy,

Do you know the sex of the iguanas, all of them?
A lot of times, they just wont get along, especially if you have more than 1 male, you will not be able to keep them in the same room.
Sometimes, females will get along, but it is not guaranteed though.  How large is the room they are all in?

What type of basking light do you use & are you using a UVB light for them?
Do you have any pictures of them?

Tracie