Thanks for the additional information. It is helpful.
Since there are other dogs in the house, your dog may be urinating as a result of showing his submission to the much larger likely dominant dogs that already live there. It is not unusual for a dog to show submission urination to men either or their owners. In fact many dogs will even roll over and urinate a little to show they acknowledge a person or another dog as the boss. There are medications which have been found to be effective for this problem and you should ask your Vet about Proin for dogs over 6 months. This should help especially in those situations where your dog is urinating when your boyfriend domes to your home.
Another possible cause is that he might be having some problems with his disc. They can lead to problems holding their bladder and even their bowels. They often will stop jumping up and avoid stairs if they can with a disc issue. proin can often help a little with this as well but anti-inflammatory medications help regain the loss of sensation a dog might have experienced.
You dog might also smell old odors of urine at your boyfriends house that are drawing him to those areas to eliminate. Often owners clean with human cleaners that fool our noses but dogs can still smell the urine that has gone down into the padding and spread out. A good enzymatic cleanser has to be used and let soak down into the padding to the subflooring to remove all traces of the urine odor to help stop it from drawing the dog back to that place to urinate again.
The other possibility is that your boy has a urinary tract infection. It sounds like your dog has a urinary tract infection. Common symptoms of a urinary tract infection are frequent urination, dribbling urine, blood in the urine, squatting frequently to urinate, strong odor to the urine, inappropriate urination and straining to urinate as well as an increase in fluid intake. A dog with a UTI does not always show all the symptoms and typically displays 2 or 3. I believe you need to have your Vet check your dog out so it can get medication for the problem if your dog is displaying 2 or more of the above symptoms..
Other causes for increased thirst and frequent urination include kidney failure, diabetes mellitus, cushing, a uterine infection (called pyometra), and liver disease to name a few. You can read about this here:
You don't mention any other symptoms so I am leaning toward it being related to submission especially knowing he has two very large dogs in the home so he would be inclined to show submission to them like he does their master. As they become more integrated as a group and spend lots of time together that should be reduced. In addition, he may have a good way of telling you he need to eliminate at home, but at your boyfriends home you are likely distracted so he may not have come up with a fool proof way of getting your attention.
Put a bell or other noise maker on the door low enough for the dog to reach. Each time you take the dog out, ring the bell. The dog will associate ringing the bell with going out and one day ring the bell to signal to you that he needs to go out. This is a good fool proof way for him to let you know he needs to eliminate. I'd start this regardless of whether you feel another reason is more likely. You do need to immediately take the dog out when they ring the bell or it loses its effectivelyness. The dog needs to associate the bell ringing with you taking them outside to eliminate.
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