According to tweet from voice actress Grey DeLisle the show will end in this year.
So this is sad news for community of the show.
Source: https://twitter.com/GreyDeLisle/status/423183679846768641Read more >
Great news everyone! Finally, after a whole month without new premiering episodes, Nickelodeon gives us brand new episodes called Close Encounters of the Doomed Kind and Golden Retriever! The episodes will premiere on December 8, 2012 (12:00pm ET). Update: More new episodes announced! TUFF Choices and Sob Story will premiere on December 15, 2012 (12:00pm ET).
Second Update: Bad news everybody! It's seems no new episodes in this month, sad but true.
New episode announced! Pup Daddy and Candy Cane-ine will premiere on June 3, 2012 at 10:30am ET.
Sources:Read more >
New episodes announced! Dudley Do-Wrong and Puppy Unplugged will premiere on May 6, 2012 at 10:30am ET. Freaky Spy Day and Dog Tired will premiere on May 13, 2012 at 10:30am ET. Top Dog and Quack in the Box will premiere on May 20, 2012 at 10:30am ET. And Lie Like a Dog and Cold Fish will premiere on May 27, 2012 at 10:30am ET
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Disclaimer: Since Nickelodeon seems to constantly change their schedule at times, we recommend accepting this news with caution.