My Pug

Question
I have an 8 month old pug whom I have had since he was 8 weeks old.I got him house broke in about 3 -4 weeks but now for the past 2 weeks he is peeing all over everything and I can't figure out why he has started this.I let him out constantly but I feel like I need to keep him in his crate all the time because he is ruining my carpets and I feel that is mean so I need to try to figure out what to do with him.Any advice?

Answer
Is your pug neutered??? If not, this is the problem.

Keep the dog on house tab (long lightweight indoor leash) so he cannot get out of your "jurisdiction" to mark (which is what he appears to be doing.)  OBSERVE HIM; if he sidles up to an object (table leg, etc.), interrupt by clapping your hands or making another loud sound (bang on table), do NOT yell at him.  within five minutes, take him outdoors for a few minutes to see if he needs to urinate (he most likely won't, this may simply be marking behavior, but you never know!)  DO NOT scold him for urinating indoors or he won't urinate in front of you outdoors, and this is not to your advantage.  Do NOT let him have run of the house for any reason.  When you are not at home, confine him to the kitchen (where is marking will do minimal damage and can be thoroughly cleaned, not using ammonia products.)  DO NOT keep him in his crate all the time!  This isn't teaching him a thing and it's not humane (as you realize.)  Reinforce his house training: no 12 week old dog is house trained. Go OUT with him and reward/praise his appropriate elimination.  Do NOT let him out by himself and keep him outdoors until he has done what's necessary.  Allow him fair outdoor experience, five times daily (minimum).  

Meanwhile, establish some psychological control over this dog by introducing some positive reinforcement training.  Go to ClickerTraining.com.  Teach him one behavior at a time (five minute sessions 3x daily, if you can), beginning with "sit" (but use a different word, as this word is normally taught incorrectly by most owners.)  After he has obtained a conditioned response to your command for 'sit', ask him to earn going out and coming in, being fed and getting treats.  This will help him understand that this living space is NOT his domain and that he does NOT need to mark it.  If he's not neutered, do it ASAP, since he's already obtaining testosterone driven behavior.