This may be of interest although I suspect you are not thru hiking so your needs may be a bit different.

And issue to consider is that dogs nails will puncture a tent's bathtub floor.  NM is not noted for excessive rain most of the time but I believe it can rain hard when it decides to so you probably want to keep the floor waterproof.  You could use something like this..

to line the inside floor.  Tyvek might also work...often used to make a cheap footprint to protect the tent from the ground.