Klein checked into rehab to deal with his problems in 2010 and he's now celebrating over 19 months of sobriety, and he admits he owes a lot to his German shepherd, Chief, because the pooch helped him come to terms with his problem.

He tells People.com, ""He (Chief) would get agitated that the alcohol was coming out, and I will be forever grateful to him for that.

""He began to recognise the behaviour shift in me when (I drank) alcohol and his behaviour would change. Anybody that has a meaningful relationship with a dog will understand that the disappointment that I saw in his eyes, it was insurmountable.""