cow, pig, chicken, ship.
limit 10 entities per 1 chunk.

CMDS:
/lepclog: on, off log
/lepcstart: plague start
/lepcstop: stop plague

if you want to change limit
on load:
set {limitentityperchunk::limit} to 10
in this, change 10 to number you want

if you want to add or remove signed entity
in 22 line, modify "cow" or "pig", "chicken", "sheep"

YOU HAVE TO COMMAND IN CONSOLE