Tulips:
Do you think your rats are a resident bunch that are trapped in your house or are they now able to come and go freely? If the latter.........that is a problem.
And are they roof rats (hanging out in your attic) or the much larger brown (Norway) rats living in tunnels down low? Coming up through a toilet sounds like Norway rats.
So these guys are super tough. Able to swim half a mile of open water? Fall 50 feet and walk away unharmed?
https://wildlife.unl.edu/pdfs/rodent-proof-consturction-structural.pdf
Do you think your rats are a resident bunch that are trapped in your house or are they now able to come and go freely? If the latter.........that is a problem.
And are they roof rats (hanging out in your attic) or the much larger brown (Norway) rats living in tunnels down low? Coming up through a toilet sounds like Norway rats.
So these guys are super tough. Able to swim half a mile of open water? Fall 50 feet and walk away unharmed?
https://wildlife.unl.edu/pdfs/rodent-proof-consturction-structural.pdf