Continuity mistake: When Fred has a nightmare he drops his pillow on the floor, and just as Wilma gets out of bed to pick it up, Wilma's pillow simply vanishes into thin air within the same shot. (00:13:50)
Other mistake: At the start of the episode we're shown a preview of the episode's plot: while Fred stretches his leg on the ballet bar his leg gets stuck and when the ballet teacher pushes his leg down, the part of the ballet bar which Fred is leaning on is gone. What's odd is that during this scene within the episode the ballet bar is perfectly intact. (00:00:25 - 00:14:40)
Continuity mistake: During the circus performance, Rodney the knife thrower is wearing a one-shoulder outfit, which repeatedly switches from his left, to his right shoulder, and back again. (00:17:30)
Continuity mistake: After Fred and Barney leave for the hospital without Wilma they realise the mistake and head back to the house, and when it cuts to Wilma in the bedroom Dino jumps atop the blue blanket on the bed, but in the next shot the blue blanket is gone, and then it reappears for Dino to hide under. (00:16:35)
Continuity mistake: When Fred introduces Wilma's book to Barney, the book is red, but when Wilma is reading the book in bed later, the colour is now green.
Continuity mistake: When Fred is reading his letter about his position being accepted at the Stone Valley Inn, you can see Wilma is sitting in the chair next to him, but in the next shot the chair is empty and Wilma is nowhere to be seen, then she reappears in the chair.
Continuity mistake: When Fred and family start their drive toward Jellyrock Park, the trailer has one window and a door on its right side (behind Wilma's side of the car), but when they reach Jellyrock that side of the trailer now has two windows and the door is gone. (00:11:50)
Revealing mistake: While Grandma Dynamite is on the roof sending smoke signals, Sonny is standing in the tree. When Sonny starts laughing we can see the bottom of his jagged clothing is now a mere straight line and his legs have vanished. (00:16:45)
Continuity mistake: When we first see Dino at the condo, he has no collar on him. But when he chases the Von Slatens out, the collar appears.
Continuity mistake: When Barney is at the pay phone, there is a dial in the centre of it, but when he sees the car going off on its own with Fred in the driving seat, we cut back to Barney and the dial has disappeared.
Continuity mistake: When Fred picks up the receiver on the telephone, there are five holes on the dial, but when we a close-up of the dial in the next shot, there are now six holes on it.
Continuity mistake: When Fred is sleeping, the time on the alarm clock reads 7 a.m., but when we see a close-up of the clock, it reads 5 a.m.
Continuity mistake: When Fred walks into the room with a snack for a second time, he goes back and returns with a purple salt shaker. In the next shot, the shaker is blue.
Continuity mistake: When Fred hands Barney the job advert he saw in the newspaper, Barney takes it with his right hand but a close-up of the advert shows him holding it with his left hand.
Answer: The name of the pet is "Baby Puss." He has appeared in episodes, but only a very few. The first episode was probably "The X-Ray Story" from season 2.
Bishop73