The judge accepted Alfie Loft's "genuine remorse", adding:
He did this in a very public way which was distressing and alarming for members of the public to observe.
Loft, from Hatfield in Hertfordshire, was ordered to pay £250 compensation to the owner of the dog, £85 costs and £60 victim surcharge. A 12- week curfew between the hours of 9pm and 6am at his mother's home is to stop him from drinking alcohol.
19-year-old Alfie Loft says he is 'sickened' by what he did, adding: "I don't know what my mum is going to say."
The Chihauhau's owner had no idea what happened until the video was posted on Facebook.