and that was just front side and back you can just bark dust or whatever. 

You can require that they abide by common pet rules like keeping it leashed, cleaning up after it immediately, not allowing it to bark and disturb the neighbors, etc.You can read the HUD guidance HERE and pay particular attention to the top of page three for the two questions you are allowed to ask.I hope our government gets this fraud under control soon.

They may bark incessantly when no one is home. 

If you knocked on the door and the dog didn't bark, then they either don't have a dog or they were out walking it.

I'm a teacher, I can't help it.So, when I was at my cabin last weekend, cleaning for the photo shoot, I couldn't help but notice that my immediate next door neighbor has a dog that barked nearly all day on Saturday but then was completely silent on Sunday. 

To your question, Kait's husband occassionally "barks" at them to pay and their last payment was like $1000 for a year's worth of rent.

I've seen some sites that do and others that appear to list their properties directly through the site.I might be 'barking up the wrong tree' and I'm not particularly invested in the idea so a feedback is useful.ThanksJohn

Will they bark until your other tenants move out, citing the annoying animal as the cause for terminating the lease?

Why are you even barking up this tree if you haven't run credit and taken a full application? 

Sounds like all bark and no bite.