What is the hardest dog to house train?

There is no such thing as a perfect dog but if I had to pick I would say a Chinese crested. You might of heard about Chinese cresteds being the ugliest dogs but there is a haired version called the powderpuff. They are VERY smart like my dog Kodak YouTube.com/watch?v=FgYxCZ_iILc">http://www.YouTube.com/watch?v=FgYxCZ_iILc and they're hypoallergenic dogs. They are super sweet and will love you for life! :-)

Now if I had to pick a big dog I would say a Standard Poodle. They are smart and loyal. You can cut their hair short if you don't like curls. (Not all of them are FANCY PRISSY dogs.)

Hope this helped! :-D

Good luck

If all else fails, get a mutt. ;)