I didn't want to place this in the more popular parts of the forum as I have no wish to name or shame the company (who I generally very much respect).
I do wonder how common this is though, and as for myself, it has never happened before no matter where I have purchased fresh meat online.
We have been using a popular organic delivery service for 4 months. The veg is excellent and we are really happy with the vast majority of what we have purchased so far. We have had the best eggs, cheese, bread and seasonal fruit & vegetables that I have tasted in a long time, so we would be loathe to give it up.
Problem: this week's delivery contained extremely rancid chicken thighs. These were fresh, expensive organic thighs well within their expiry label, and we set about cooking them very shortly after arrival. They have not sat around, our fridge is working as it should, etc. The smell on opening was vomit inducing, and did not improve (it wasn't the typical gamey smell of safe, just-opened meat).
Even more depressingly, this is the second time it has happened, as our last delivery had discoloured chicken chunks which we had to throw away after opening. I was fine letting it go initially, a one off, etc, but what are the odds?
I will obviously contact them on Monday for a refund, but I am wondering how common this is, and why on earth they're getting it so wrong? 
I haven't been able to locate any customer complaints online, so perhaps we have just been unlucky?
I mean once is a bit shit, but twice is pretty off putting. And when I say it smelled bad, I mean you still wanted to heave long after taking it outside in a sealed bloody bag. We had to leave the door open for an hour.
Would this put you off?