Q: Think of a world capital. Change the third letter to get the informal name of a farm animal. What capital (and animal) is it?Bonus puzzle: Take out the vowel that is repeated in the name of the farm animal, rearrange the remaining letters and you have a word relating to Wales.
Edit: The remaining letters when rearranged spell CWM, a rounded, glaciated valley, especially in the mountains of Wales.
A: MOSCOW --> MOOCOW