Change your cat's bell to save birds

Wildlife experts have told cat owners they need to regularly change their cat's bell to stay one step ahead of their pet.
They are also calling for owners to give their cats garishly coloured collars and to install sonic devices in their gardens to scare their pets indoors.
The advice is contained in a new guide produced by the British Trust for Ornithologists (BTO) which aims to reduce the impact of cats on garden birds.
Cats are believed to be responsible for the deaths of 55 million birds in Britain every year and have been blamed for contributing to the long term declines of garden birds like the house sparrow.
Populations of other garden birds, such as the robin and dunnock, are also said to suffer from predation by cats.
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