If I get my male dog fixed will it help him to stop peeing and pooping all over my house and especially on our beds?

You definitely should get him fixed anyway. Make sure the vet checks for a UTI also.

How old is he, and does he obey commands otherwise?

He is 9 months old and a poodle japenese chin mix he has been housetrained ,but we also have a 120 pound lab mix and wonder if he does it trying to be the Leader of the pack so to phrase it . I do plan on getting him neutered anyway but was just wondering about this and the pooping on my daughters bed was the last straw she's 19 and he is not allowed in her room but got in there anyway and voilà

Sounds more like he's not fully housebroken, and not a territory marking issue.

Yes, getting him fixed will prevent marking. It won't fix housebreaking issues.

I know very little about housebreaking dogs, so I won't even try to give advice on that. I will say that if the vet doesn't find a medical reason for it, that they may have some advice or pamphlets that may help in better training him.

I'm a cat person, but read the Dogs board religiously. It does sound like he's reaching for the alpha position over the other dog (and the rest of his "pack," the humans in the house).

Tell your little buddy, "The time has come!"

The Dogs experts will weigh in with better advice than I can give you. Please check back for more responses.

No guarantees as to the effect it will have, but it sure is the place to start. Expect the greatest effect to be in things that are sexually oriented... territory, and females are the main targets of male animals. Territory because that's where all the females live, in case there are any he has missed in his travels.

At 9 months, his 'sap' has risen and he is probably trying to figure out why all the strange feelings. Dominance, territory, people... all these things suddenly have new meaning, and he is probably just trying to do what his instincts are whispering in his ear.

I, too, wonder if he is completely house trained, or if there isn't something else on his mind. Is the lab allowed in the daughters room?

Animals recognize the gender of other species, and he is a young impressionable boy, so he is marking those things important to him as being 'his'...

Completely agree with Paleos comments.

I have a male miniature poodle who used to mark in the house at least twice a week. At 12 months old we had him neutered and the behavior seemed to stop immediately.
He still does have the odd "accident" maybe once every 4-5 months he will still pee on the bed if we forget to shut the door, but marking everywhere else stopped completely.

I believe bed marking is a dominance issue, it's the place where you (or your daughter) sleeps, it's loaded with your scent and he wants to make it (and you) belong to him.
Neutering should curb that instinct to make everything belong to him.
Training will still be needed, I think I just got lucky with my boy, but training should become much easier.

I agree with the above as well. Marking can be stopped with neutering. It's not 100%, nothing ever is, but it is a good start. I would question the house breaking as well, but as he is urinating on the bed as well it makes me think dominance. If this is the case than neutering should certainly help. Remember it won't stop over night, as it can take up to a few months for the testosterone to fully leave his body.

For the time being, I would not allow the dog on any beds or couches. Crate while you are away. You need to let him know he is not the top dog, and he needs to step down. Keep in mind he is still a pup and will have accidents, but constant marking in one area or on a bed usually tends to be a dominance issue. Go back to basics, after every meal, drink or play time he goes out side until he uses the bathroom. Praise once he has done what you expect him to do.

I agree as well.

This is the perfect time to get him fixed if you want to avoid behavior issues that are present in unaltered dogs.

Marking his territory is a possibility. The only thing that doesn't match up with that is the defecating.

Sounds like he may not be as fully potty trained as you think.

Do get him neutered, it will help with the peeing, and it really is the very best thing you can do for your dog, not only health wise, but for behavior as well.

Good luck.