Sometimes, with untrainable tenants, you just have to bite the bullet and have them put down. 

They are untrained animals, can be just about any animal on earth, and do not have to be "prescribed" by a medical doctor.This tenant is a great demonstration of how fraudulent the system is.

He's a pit strong untrained and vicious.

Are there any red flags that my untrained eyes (and ears) are missing?

Pet damage is NOT considered normal wear and tear.While I'm not certain this would hold up if challenged, it has scared a few who asked if they could get a puppy or new dog mid-lease into just moving at lease end to somewhere that allows puppies or untrained dogs. 

The main level itself does look fairly good but to the untrained eye as myself as green as I am what is assume that it is a good cover up and that there is possibly mold Behind the Walls there.

From my untrained eye, it definitely improves the ease of entry and return based on initial investment for my position currently.

To the untrained eye, this appears to be a grim reflection of the market.

At that price/visual inspection on photos it looks like a great deal to my untrained eye.

not sure how long you have been looking or driving thru them, but until you start looking at them all the time, to the untrained eye they can all look trashy or bad, based on stigmas....or in this case all of them could be trashy and in bad areas.