Dragons in Snow by Judy Hayman
This is a particularly difficult winter for the Scottish dragons. Emily and Tom are missing their friends. A new game on the frozen loch with the otters is fun for a while, but soon they are trapped and in danger. Help is needed, and it comes most unexpectedly! A dangerous journey, a secret hide-out and the closest encounter yet with Humans make this the most adventurous of the Dragon Tales so far. This is the fifth of the Dragon Tales Chronicles.