yes any dog can be train but it take time n patients. i used to run a rescue from my home. someone surrender a 3 yr dog mid size dog to us due to not housebroken and when he got scared he pee on the floor. we house broken him in a month and stop pee to in 6 weeks.
we kept him on a bare floor in the house. or in a crate at night. when u call him at first he pee. then he learn that he got love and in the morning when we open the door of the cage he pee again. we did not say anything until we got to door and went out to go the bathroom and there we play with him. and praise him to do it outside. so he had access to the rest of the house after 3 days. he only pee when he got scared. and we broken him too. he was adopt out to couple and still living with them.
just make sure you have a place for the dog to be until it is housebroken.
we kept him on a bare floor in the house. or in a crate at night. when u call him at first he pee. then he learn that he got love and in the morning when we open the door of the cage he pee again. we did not say anything until we got to door and went out to go the bathroom and there we play with him. and praise him to do it outside. so he had access to the rest of the house after 3 days. he only pee when he got scared. and we broken him too. he was adopt out to couple and still living with them.
just make sure you have a place for the dog to be until it is housebroken.