The venomous thing has been covered.
The only other "bad" I would put out there is that their metabolism is higher so they tend to crap a LOT and for some reason they seem to like to wait until 30 seconds after you just cleaned their tub to do it and then spread it around... So I clean their tubs first and then go back and clean their tubs again once I am done cleaning everyone else. And then I come back and clean their tub again the next day.