I like to put a vapor barrier (layer of plastic) and reinforcement into the slab.

If not, I recommend plastic when you do -- they don't soak up smell like wood -- even painted wood.

Rotten plastic dryer vent exhausting into attic.  

If you have fired clay tiles or decent quality plastic it's unlikely jetting will hurt the lines.

Brick is a lot more plastic than block and I have seen some bizarre bowing!

They took out the bad clay and pushed new plastic through the good section.

The house is stripped of all flooring, carpeting, ceiling tiles, pretty much everything... so some extra filtering should probably take care of this. buy 2 gallons of vinegar, and some plastic bowls: place in various places around the construction site.

Painting plastic can be done but typically paint doesn't like to stick to plastic. 

A kind lady at Lowe's (where I had gone to buy Drain-O) suggested I use vinegar and baking soda to loosen up any gunk, then use the cheap plastic "snake" to get the blockage out.

I take my dogs out a couple times daily (kids also take them out as well), we carry extra grocery bags, the plastic ones, in out pockets and immediately remove the offense soon as its dropped from the animals exaust.