Hi Stefan
We have a property on Hda and La Torre and find that there is a problem with flies on both resorts in the summer, as for the smell from the pig farms at Hda we can honestly say that it is not a constant odour and is more noticeable in the hotter weather, I wouldn't let this put you off purchasing on Hda because of this, Hda is a wonderful resort and we always look forward to returning.
Good luck with the purchase.