Recently my budgies have been biting their bars, taking the paint off and everything. I know that I need to stop this behaviour since their taking the paint off but don't even know where to start or what's causing it, any advice is welcome.
It's only one spot, the lower door where the handle locks into place. If it wasn't such an awkward location I would cover it with a toy for them to tear apart instead. Their still untame.
Currently I have a treat stick over the biting area, not the best idea but it's better than having them bite the bars while I think of a solution.