From my observations ...
Subject Zebs ...
3 pair in 1.5 x1.2 x90 absolute idiots , fighting , scabby heads ..Im ashamed of them.
1 pair in cabinet no squabbling and have young almost ready to fledge ...harmonious and a pleasure to own.
Subject Gouldians
In a mixed aviary same as above shameful behaviour but when put into a cabinet feathers grew back and all was peaceful.
Less stress in decent sized cabinet .
![Very Happy :D](./images/smilies/icon_e_biggrin.png)