I've put lots of fat balls on our balcony and it's been really nice to watch the blue tits swinging about eating. The drawback though - some two weeks later - is the state of the balcony. Now I positioned the balls so in theory the bird bottoms would face outwards over the lawn and deposits would be out of sight down below. However, the birds don't seem to realise that they are hanging the wrong way round and they seem to love using the balcony as a toilet. So, I've got to decide whether it is better to feed the birds and have to clean the balcony or remove the balls and lose the birds.
It's a hard one.