Chinchillas and damage

Hello i am a recent owner of chinchillas. My landlord saw they were in the house and has had bad experiences with dogs and cats in the past and feels apprehensive towards any animal. To remedy these concerns we placed the chinchillas in their own room that I made ( from scratch) so they could not chew on anything. The room has a hard concrete floor. Now my landlord is saything that they will produce smells and their poop and urine will stain the concrete and be unable to be removed. She is an ignorant lady and i plan on educating her that chinchillas aren't the menace she believes (except for chewing and being escape artists). I've scoured the internet and found a couple of sources but nothing i would consider factually accurate. My question is do any of you have any resources i could use to convince her that their excrements won't damage the concrete. I would also be so unbelievably happy if a breeder would write something maybe a story or something i could show her. I love my chinchillas and i don't want to have to get rid of them because of someones unsubstainiated fears.



Anything at all would be so amazing.