What is doo-fleeing?

Answer 1

Doo fleeing is an old scottish sport of pigeon flying, trying to capture other peoples birds. see: http://www.scotsman.com/news/flights-of-fancy-doo-fleein-is-more-than-a-sport-in-glasgow-1-474482

Answer 2

"Doo-fleeing" is not a common term or concept. It is possible that you may have misspelled or misheard the term. If you provide more context or clarification, I may be able to help you further.