Thanks for the replies everyone. As to the point Elly made about quarantining the birds thats a very good idea as I have only had them for a couple of weeks and the single female is only a newcomer (couldn't leave it at an odd number ). The best option then is to probably hold off and get a larger cage and house them all together some time next month. I was thinking about doing that anyway and after seeing some of the awesome setups that people here have for thier birds I was sold to the idea. Thanks again for the advice. I'm sure I will be asking for plenty more in the near future.