I'm really really sorry - please don't read on if you are upset by this, but I've just killed a very injured bird - I have a feeling this won't be the last time. If anyone has any 'tips' for killing a bird as painlessly and 'gently' as possible please let me know.
(Please do be gentle..... I'm actually really upset, the cats have been with us for 6 weeks and outside for 4 - this is the first bird I've seen that they have caught. I know this is what cats do but even so....)