Fruit flies in my duck shed - advice please?

Hi all,
I've just set up a brand new duck shed for my ducklings, and am keeping them on a mix of hemcore (citronella treated) and wood shavings. They are fed ONLY duck crumb, and are under a brooder lamp (infra red). Thy have constant access to food and water and are growing like weeds   BUT - in the last week, I've found LOADS of fruit flies in the duck shed when I go in. They don't seem to bother the ducklings, who seem to enjoy 'snapping' at them when they get close, but I've no idea where they are coming from, or what's attracting them? I've hung up non-insecticidal fly strips, but they're not making much of an impression. Should I be worried? I clean the whole shed out every 2 - 3 days and they have a clean layer of flooring every morning. I'm baffled because I don't know how I can keep it any cleaner? Please help! Thanks

It's very difficult to poo pick with ducklings as (if like mine) they drink an awful lot of water and the poops are wetter than chick poop. I too have had this problem the past few weeks in the adult house and have a redtop so not sure what else to try. The redtop is worth getting though as mine is full of flies so it would be far worse in the run without it! 

I don't think they are a problem and I do sometimes get them in with the chickens, just keep doing what you are doing - the red tops though are brilliant - we get loads of flies as we have so many trees and a beck at the side of us plus farmland all around so I have 3 of these up and they are trapping absolutely loads and loads of flies.

i dont think this weathers helping either,  if like us, we are having perfect fly weather, damp and very muggy its alwful for june,    flies are gonna be attracted to the smell of the poo, your not gonna get away from that.  Personally i have my doubts about these red tops, sorry if i step on anyones toes here but before i got my chooks last yr obviously there was no flies, then i got my girls and we got a few which was to be expected because of the poo, so after a couple of mths i had read about these red tops so i got one, hung it up like it says,  well i then began to get loads of flies its was alwful, i dont know whether by hanging that up i attracted more flies, took it down and the numbers subsided, this yr i have had hardly any flies wot so ever,   its just a personal opinion.    nickyx

You don't know how much you have all cheered me up!! I was feeling like a really bad 'mummy' to my ducklings and was driving myself insane cleaning  They do seem to like chasing the flies, and having read all your messages, I realise that I have the same conditions - farm land all around, loads of trees, and a river!! I'll try all of your tips, thanks so much.  xx

Hee hee - will do, but given my level of experience compared with yours, I wouldn't hold my breath!!