Misc: Short legged breed of Welsh dog?

Questions

Cereal Appeal: This cereal's mascot is Tony the Tiger?

Cereal Appeal: This chocolaty cereal features Fred Flintstone and Barney Rubble?

Cereal Appeal: This is the animal that never learns, "Trix are for kids!"?

Childrens Literature: Author of "The BFG" (big friendly giant)??

Childrens Literature: Leonard Wibberly on the Duchy of Grand Fenwick??