15 its no use locking the stable door after the horse has bolted
27 those who sleep with dogs will rise with fleas
29 you can catch more flies with honey than viniger
sorry can't help you with 15, & 27, and I've only got part of no 15-I think its something to do with "Unlock the stable door after the horse has bolted" but I can't fit in the other letters! Thanks for your answers-I've never heard of those rhymes, so would never have got them