Clifford the Big Red Dog (2019) Season 3 Episode 11 - Try a Little YumYum!/Come Back; Happy Jack! Episode Title: Try a Little YumYum!/Come Back; Happy Jack! Episode Description: "Try a Little YumYum!": It's Dog Food Delivery Day, but they ran out of Clifford's favorite dog food! They now have Doggy YumYums, but Clifford doesn't want to try it because he thinks that they'll taste bad. Will Clifford realize that it's okay to try new things? "Come Back, Happy Jack!": Jack's favorite shoes have worn out, and he's very sad. His friends try to cheer him up, but nothing works! After being by himself for a little bit, Jack feels a lot more better.