Shorty didn't listen to him. He was in his own world not noticing anything that happened in the real world.
"Ahh, of course I know, how to cure him!" Mr. Thicknose replied to Grandma after she finally found the wisest and oldest residant of the Valley. "He needs a special treestar, I know where to find it!
Ehmm... Flyers told me the little pink Longneck Girl from the Shadowlands...how's her name*thinks*...however, they told me she died! Should I look at her whether she's truely dead since Littlefoot wasn't dead after all? Shadowlanders know how to make someone look dead while their victim's still alive, you must know... that must have happened to your Littlefoot, Grandma!
Spike saw Grandpa in worry. He told Ducky, who just tried to tickle Petrie...