I should have probably peeked, but I was too grossed out and it smelled nasty!!! I'm almost 100% positive that its just a moue and not a rat because the opening to get into my trap was less than 3/4 of an inch tall and wide and it didnt' weigh a whole lot when I picked up the trap to throw it out.
Anyways LUCKILY whatever it is hasn't ventured far from this one cabinet which is sorta all by itself in a random area. They did however chew a nice little hole to get in there, but to be honest that hole may have always been there and they just use it to get in and out. The only place that hole leads is in between our walls!
I dont' have any birdfeeders or anything of the sort.. just a tiny little condo! and to be honest, if I see a rat in my toilet all puffed up i'd just about die. I hate rodents, blood and yucky stuff!
as for your bro.. I hope that the ibs does go away now! you never know! i'm sure the onset was definitly in connection to it.