The Dog Whisperer to Mom: Thanks for the "tsch!"

The Dog Whisperer - otherwise known as Cesar Millan - sent out an unusual Mother's Day greeting to his mom today. He thanked her for the "tsch!"

That's the signature sound that Milan uses in his dog training. He tells us it was the same sound his mom used  when he was growing up to let him know when he had crossed the line.

Take a look: