As an owner of a Pest Control company that specializes in health care and food safety, I run across this all the time.
Heavy rodent pressure around assisted living home facilities due to the large number of residents with bird feeders.
Now, you can't blame the families, because they just don't know what else to get Grandpa because they sold all his shit to put him in the home. They don't allow scantly clad hookers in the resident rooms after 8pm because that's when the Matlock and Murder She Wrote re-runs are on. So they get Gramps a bird feeder which become my problem.
Now, I'm not about to tell a guy who faced German machine guns on the beaches of Normandy that he can't have his fun of watching the fucking birds and I'm taking away his feeder.
So what I do is try to have the staff, who hates me for telling them this, to rake up around the feeders every once in a while. No food source.....not rodents. But that rarely happens. So I place out a few bait stations to Dept of Ag specs. And in it, I put First Strike.
Now.....this is Arfcom and even though I do this for a living.....even specializing in this type of problem and now have franchised my business......I will be told that I have no clue what I'm talking about and people will tell you all kinds of other remedies.
What I'm telling you is this. Keep the area clean and if you need a quick clean out, with a product I tested with my guys again and again in all kinds of situations.....Go Lipatech. Yes, it's expensive. I only use the best for my customers. This shit is the best.