P.S. At the very least, Aric, you could start with the opinions of everyone here and tell your parents that this is almost certainly NOT a behavior issue. I don't think anyone who read your first two posts thinks that it is.

It would be so sad if the dog was ever punished or even verbally admonished for something he has zero control over or understanding of.

A urinalysis was done, as were blood tests that came back clear of any abnormalities. I will recommend the belly band idea. They only received a vet sheet showing that he had been vaccinated when they got him at 4 months old. No as far as they are aware he did not suffer from any injury or previous infection.
The urinating occurs every day, however between 5-6 months of age there were no accidents at all. It started shortly after he turned 6 months old.
There is no ammonia odor around his bed/crate, just a strong doggy odor. His penis seems ok no redness or flaky skin.
As for his drinking habits, I think he drinks alot. Not just for his 120 pound size, it seems as though he drinks too much if that makes sense? Yes I have actually seen the urinating, no squatting, no leg cocking, no signs whatsoever. Just standing and/or walking and suddenly going.
I will most definitely talk to them and double check he isnt being reprimanded for these accidents.
Sorry for lack of proper grammar and punctuation, just trying to answer all of your questions while im on break. Thank you guys.

An important thing about the dog that I knew, the daschshund, was that he wasn't able to initiate urination at will. The owner would take the dog out, and it might urinate, but it seemed unable to
"decide to pee" and then complete the action.

This inability to initiate urination in a voluntary manner was what led to a diagnosis of a neurological deficit.

In this little dog there was also no history of trauma, no UTI, no stones. He was clean in his crate if kept there for 5-6 hrs, though he would often begin peeing when the crate door was opened. This dog also became incontinent with stool, in time -- the poop would just fall from his rear end as he was walking along.

From what you have described I would recommend your veterinarian examine the dog from a neurologic standpoint, checking reflexes of anus, hind limbs, etc. This is not an expensive examination, just a thorough physical exam by someone with an eye for what's neurologically normal and what isn't.

There is also a condition called diabetes insipidis, so very very rare, from a lack of certain hormones in the brain, causing a "washed out kidney" which can't retain water in the body, that causes a tremendous drive to drink water and a bladder always full to over flowing. RARE and certainly unlikely, but can cause what you describe. You might Google that.

Also one could check on known defects in the Dane breed. Lots of peculiar things show up in certain purebred dogs. Perhaps this is a known syndrome.

I have looked Into this for the breed, and it does seem fairly common. But the prognosis is usually an UTI, perhaps I shall tell them to re-check for that on the vet visit this week. I sure am hoping its not one of the more serious possibilities. I totally forgot about another possible symptom that I just "brushed aside" thinking it was from bad genetics or the beggining of serious hip dysplasia. .

His hind limbs seem weak, as in having issues at times standing up after laying down. Even if for just a short period of time. Also his gait seems affected by this, his run is far different from there year and a half old great dane bitch.

For what it's worth, I was really worried about Louis legs which I did post a question on here a while back, I will see if I can find it....

His gait is weird too, his front left leg trembles at the wrist joint when he is bending down to eat, his walk is like a stiff legged goose step and he runs like a rocking horse, now whether that's down to the idiots that let the 'accidental' mating between the Dane bitch and the Boxer dog, I don't know, it may be a quirk of the breed.

I don't know if any of that is going to be of any interest to you, but I thought I would mention it.

 Quote: Aric Buss

I have looked Into this for the breed, and it does seem fairly common. But the prognosis is usually an UTI, perhaps I shall tell them to re-check for that on the vet visit this week.

In rechecking for a possible UTI, I would ask the vet about doing a urine culture instead of just another urinalysis. It is more expensive and the results take longer, but my understanding is the culture is much more specific in identifying the type and amount of bacteria present, if any, and precisely which antibiotic would be most effective.

This is just my layperson's view. I'm no expert but I have one dog who used to have recurrent UTIs, so I've been through many tests, treatments, etc., including a bladder ultrasound to check for stones or other issues. (But uncontrolled urination was never one of her symptoms.)

However, based on other symptoms you've mentioned, it sounds like there are other issues that need to be looked into. Wishing good luck to your family that this will turn out to be something relatively simple and fixable.

I don't know if you're familiar with these, Aric, but these are the type of "belly bands" that Cathy was referring to earlier in this thread. They are inexpensive and might be very helpful in managing the issue (and your parents' stress in dealing with it) while the cause is being investigated.

http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=24773

For a Great Dane size bladder I would tuck a human incontinence pad(Depends) in there to help absorb pee especially since it's coming out in a flow rather than a dribble.

Wobblers is in the breed and can cause incontinence and hind end weakness.

Do you have a neuro specialist in your area? They are more expensive per visit but it might come out cheaper than chasing the issue through multiple regular vet visits. You could also call around to rescues of breeds commonly affected by Wobblers and ask if they have a vet who is good with neuro issues even if they don't call it their specialty.

A Dane with Wobblers
https://www.youtube.com/watch?v=S8piNrhIGic

If this is neurologic in origin a fix is unlikely, so I'd have your folks get it worked up ASAP so they can make a plan and not get their hearts completely broken. A UTI would be uncommon in a young male dog, UTI being most common is old ladies like myself!
If this dog comes from any sort of decent breeder there should be some help there.

Neurogenic/neurologic incontinence ....

Betty needs no support from non-health-professionals, but I still want to chime in that after a couple of evenings spent looking up both online vet discussions and vet handbook entries, my heart ached too, reading about nerogenic incontinence.

Please get a diagnosis asap. No sense at all in, as Betty says, getting their hearts completely broken .... if there is really no reasonable help.

They need a solid diagnosis. JMO!