Yes, well, it was probably past time for some Spring Cleaning in the general area of the stove, sink and dishwasher, anyway, so a little rot under the floor mat should be expected. Maybe.
I had a little rot under the sink.
In one of my Electronic Rodent Eternal Rest Motels..
It's what happens when it's hot and you neglect to check for sleeping tenants daily..
The hotel unit has been exiled for cleanup of carrion odor at a future date..