Oh yes mine piddle widdle on all their ones :lol:...fortunately bath mats do well at absorbing the wetness and dries quite quickly compare to say a rug or towel.
If the mat only has a few damp patches on it then I just pop it in the tumble dryer of a morning and wash it when it is badly stained otherwise I would be washing the mats every day, which isn't ideal really as it is not my machine I use and the future mother in law can be funny about bunny stuff going into the machine :lol: