Hmm so there has been foul play (fowl play?) in the aviary. The canary killed both the zebra finches. I did see him pecking the heck out of them a few times and one morning there they were, pecked to death. And then, the canary died, not sure whether it was injuries, shame or the cold weather, and then I let the goldfinch go cos he was attracting lots of other goldfinches to the garden. I hope he's ok. Anyway now I have two lovely budgies and they are very happy and well and not showing any signs of killing eachother or anyone else but I do have a hole in my finger from when I had the audacity to try and feed them today.