Dogs do it.
Millipedes do it.
Dinosaurs did it.
You do it.
I do it.
Octopuses don't (and nor do octopi).
Spiders might do it: more research is needed.
Birds don't do it, but they could if they wanted.
Cel
Cartepedia
Anticexlibris
Does it fart?: the definitive field guide to animal flatulence