However, I had the carpets professionally cleaned yesterday, and now the carpet has an intense "wet dog" smell.I'm meeting my new tenant for a walk through tomorrow, and I hate that it smells.

An excess of chlorine will be quite noticable with a strong smell, unlikely there will be a color change. 

If it sounds like a troll and smells like a troll it’s probably aTroll

The association sent us letters complaining of the dog feces smell coming from the back and it goes on.

If they couldn't use the shower or toilets and the place smelled bad for two weeks, I would absolutely give a discount - even if the tenant didn't ask for it.

I’ve incurred the following expenses- $250 house cleaning- $600 clean wood floors, carpets and tile (fairly significant food smell in house from curry etc)- $50 paintBedroom door was broken.

The smell is undescribable - a mixture of feces, urine, dead rats.

If the rent wasn't being paid, you smell marijuana or hookers / druggies were camped out in the hall that would be terrible.

As mentioned you also get the new paint smell which is definitely a plus to potential renters.  

Are those tenants actually paying their rent or are they warm bodies?