I was playing in the sewers today, and something seemed a little different:

There was literally about 15 rats and 10 gobbles around every turn. You could not go anywhere and not find about 3 overlapping gobbles attacking you. I really just want to get some answers because I have none.
1. WTF?
2. Have the sewers been changed into this on purpose?
3. Is this a glitch in the game?
4. Am i overreacting about this problem?
5. Does anybody know?