Dead animal smell, who is responsible?

[Justin Holmes]

I live out of state and do not use a property manager for this property in particular (I use PM on other properties, just doing a trial of no PM).. I have a tenant who has mentioned a foul odor coming from under the house and has asked me to send someone by to go under the house and see if a rodent has died. I feel like this is definitely on the tenant since this has occurred 2 months after they have moved in, but not 100% sure.  Whose responsibility is this? The landlord or tenant. State is Alabama. Thanks in advance.