Just wanted to chime in that I've had my share of hair elastics go missing and then found them pooped out in my crazy boy's toilet. :/
Really worries me that he has this obsession with eating rubbery things (rubber bands earn exactly the same response).. particularly because we have tenants in the basement who aren't really savvy in the potential harm this could cause and tend to leave rubber bands from veggies, etc. in accessible locations. Nowadays I am always on the lookout for the things and regularly change where I hide my hair elastics because he somehow sniffs them out after a while and gets into make-up bags, cupboards, you name it.
My F7SBT girl Paris is obsessed with rubber hair bands, to the point of trying to remove them from my hair, and is the reason I wrote this list

I too, would find the evidence in the litter box or in cat puke.....I also know how dangerous they can be if they do not pass through. It took a real effort on my part to keep my hair bands in a safe location. The only container that can deter my kitty is an old soap tin with a very tight lid that is kept in the back of a drawer. Paris can smell them kept in any other container or loose in a drawer or purse, and has not attempted to open the drawer my soap tin is kept. We never keep rubber bands around now, either.
Perhaps you could provide your tenants with a container or even a lidded jar to put the rubber bands in and/or limit your Savannah's access to their living area? Print out this list and have them read and sign it, and give them a copy? I would also think you, as the landlord, have the right to ban rubber bands, but I am not sure on that unless it is already on the lease contract. Smoking and pets can be banned, after all. Tell the tenants they will be responsible for the surgery bill when one gets wrapped around your cat's tongue or creates a blockage......it won't be cheap...IF your kitty survives
