Looking for a horror flick that involves little people and children's breath

[Brit2nv]

From what I can remember the move revolved around little beings that came out at night while the children slept and tried to steal their breath, or soul. If I remember correctly there was a cat that protected them, but the little ones evetually got a bell around its neck to alert them to when it was coming.
For some reason I have this feeling that it was either from a Tales from th Crypt movie short or possibly from a Stephen King short. Any help would be greatly appreciated. Thanks in advance for your assistance.