Fantastic Four Vol. 1 Annual 17

"Legacy"

This story starts back in FF # 2, where the Fantastic Four defeats four Skrulls that were impersonating them. Reed hypnotises 3 of them into believing that that they’re cows and sends them off to graze in the dairy community of King’s Cross.

However, the “Skrull cows” get mixed with the normal heard of a local farmer . . . and this is where the story picks up.