Housebreaking a rescue Bichon

Question
Through a mutual acquaintance we received a 14-month old Bichon about 2 months ago.  Won't bore you with details, but from Kiko's appearance and behavior, it is obvious he was neglected/abused.  We have been following the advice here for housebreaking older dogs, but we don't seem to be making any progress.  We walk him and let him go out into the backyard at least 5-6 times a day(he has never indicated a desire to go out by standing at the door, or scratching, or any other behavior).  He urinates and defecates when out, at  random locations on a walk, and at his "spot" in the back yard.  But once in the house, if he gets out of our sight he will often urinate or defecate, even within minutes of having gone during his walk.  Feces are firm, no issue with diarrhea.  Urination (like lightning) is rarely in the same place twice.  Just today we returned from a good walk, I walked to the back to hang up my coat, and when I returned he had jumped up on the dining room table, urinated, and jumped back down. I could not have been away from him for 60 seconds.   There was no food (or anything for that matter) on the table to attract him up there.  There are 6 of us in the family, he is rarely alone except when crated at night, but we've never actually "caught him in the act," leading me to believe he "knows" he shouldn't be doing  this.  Other than this his other "flaws" consist of occasional aggression towards some houseguests and running for cover if he sees a belt when someone is un/dressing.  We love him, and he seems to have adjusted to us, but the long-term damage this will do to our home has me reconsidering my decision to adopt.  Any other suggestions to eliminate the "accidents"?  Is it possible that he might be untrainable (given his first year of life)?  Thanks for your suggestions.

Answer
Hi there Wayne, now I must congratulate you on adopting and dont despair , you are doing really well. Firstly I note that he is crate trained, this is a real positive move. Secondly I noted that he knows that to poop and pee is best outside another plus point. To get to grips with this issue isnt hard its just consistency , however I feel that its more he is attempting to establish roots within the house, the table peeing is definitley a dominance issue, he feels he needs to tell you all that he is happy with you. The worst thing to do is to shout at him especially as he appears to be scared of discipline.Here is how I would approach this particular problem.
When he comes out of his crate in the morning you should speak very little and immediately place outside, dont bring back in until he has done a bit. Then bring inside and feed immediately with raw minced meat mixed with small (tin dog food) optional  and some veggies and oatmeal. make patties out of them and feed him. The reason I suggest this , is that its easier to manage a dog that produces fewer stools and dogs fed this diet produce far less. Then once again place back outside until he has done a bit.
If he does any inside immediately place dog outside and clean up , leave him for a few mins (up to 10 ) and bring back in, repeat this process at every time , do not ever shout.
He will scent within the house until it smells of him this is natural, dont feel offended dogs dont wee or poop as an insult they do it to establish boundaries around their cave so to speak. They do it to protect YOU .
If he contimnues after say 6 months to scent alot then I recommend neutering however It will increase the likelihood to cruciate injuries and patella problems , vets still dont know why, I would suggest its due to decrease in testosterone.
Training him to poop on command is actually quite easy even with an adult dog, its all about patience, consistency and repetition and NO SHOUTING .LOts of treats and the use of a really good word(s), I use poopies and whizz. What I suggest is that you go to my health and training site and read the step by step instructions on site , its self explanatory and will cut your work down by several weeks.
The aggression is another issue, he feels threatened with too much company, feel he was likely in a household wither eiother no kids or an elderly person, both create negative energy for a social animal like a dog.Dogs are social animals and need hustle and bustle in everyday life. This will take more time  and alot of patience, start with buying some belts and leave them about the house and play with them attached to a toy that only he has use of, drag along floor rather than raise in air. Talk to him constantly , even gibberish will settle him around objects that he feels threatened by.When he runs for cover donot go after him , try to have his crate open with treats inside so he can use that as a safe cave or den, cover it up on top and sides and place chew stick inside , when he retreats encourage him to use it.A crate isnt ever a punishment zone its  a safe haven and they really do love it.
I often have dogs here that are adult and have been in an environment that isnt punishment free, they are nervous but not untrainable, they will eventually be the loyal doggy you want and in most cases they are far more loyal than the puppy turned adult dog .
Once again I do suggest that you read the articles on training I have onsite dealing with aggression and dominance.
Once you get your head around why kiko is aggressive then you can begin to alter this negative behaviour. Kiko is simply establishing his new boundaries, he is wanting you all to him self. By the sounds of it he likes you alot and is simply asking others not to come between you and him.

KIko is at the age when he is going through puberty he is a juvenile dog that has some issues, they are all resolveable , and within reach of about three months.
Please look at the site and read the step by step instructions we have .

www.eurobichons.com