New Peeing Problem

Question
My husband and I have 2 pugs (4yrs old) and a cat (3yrs old) and a new 9 month old Bull Mastiff.  They all actually get along great but in the past 3 months we noticed that my husbands clothes on the bathroom floor were being peed on.  Now it has progressed to pillows and the upstairs couch.  The dogs are contained during the work day and are with us when they are out, so we can't figure out when it is happening or which one it is.  We think its one/both of the pugs because we caught them once a long time ago but now its progressing and we don't know what to do.  Please give us suggestions!!! THanks!!

Answer
It's unlikely that the Bull Mastiff is to blame, first because he's so LARGE (and you'd notice if he was the culprit due to copious amounts of urine), second because of his age and third because he is most likely (despite his size) the lower ranking (due to the "pugnacious" character of the Pug!)  One of your pugs (you don't mention sex but at least one has to be male) is marking your husband's clothes because they contain the scent of the true "alpha male" in the household and has now begun to mark the places where this "alpha male" enthrones himself.

First, remove the clothing from the bathroom floor.  Buy a hamper.  Second, do not allow any of your dogs to sit on the furniture for any reason, at any time.  Put them OFF the moment they jump up, every single time; you can put lightweight indoor leashes on them and use the leash to put the dog off, gently, with a firm "off" command.  Do this every single time and they will soon get the message (although they will also TEST this many, many times and you cannot miss one opportunity to remove them.)  Also, read about multiple dog households and problem behaviors, a book on this subject having been written by Patricia McConnell, Ph.D.  You need to observe who is who in this multiple dog household by paying attention to the dogs themselves.  It appears that one (most likely a male Pug) is attempting to make a statement to the new addition; he requires validation as higher ranking, should this be the case.  You will learn from reading that book how to determine natural rank among your dogs, how to read their body language toward one another, and how to appropriately "promote" the right dog.  Institute some positive reinforcement training to each dog separately and, following a three week course of training, require each dog to earn interaction with you for at least two months.  This should firmly establish a sense of security (someone is in charge, and it isn't me) for each dog.  Any further questions regarding any of this, or further input, please repost.