This has been a complaint by many people here. It seems after they get fixed they resort to piddling everywhere. From what I know, you have to start over again but hopefully he'll catch on quicker. But give plenty of rewards. Ignore the accidents, no praise, but when he does it where he is suppose too, praise to the hilt. That means carrying little treats in your pocket and praising immediately. Connecting the treat to what he just did. They are frustrating little creatures aren't they??
__________________ Carol And Jemma 
Be Kinder Than Necessary, For Everyone You Meet Is Fighting Some Kind Of Battle |