Cheers I'll have a look and see what I see.. Our cats are pretty quick with their food, tho... We also have one of those sonic pest deterrent things.. Seems to work; we get almost no cockroaches (thank the stars.. I hate cockroaches) or other crawlies; the odd Huntsman spider but even they are rare, which is unusual for where I live.. Spiders everywhere, everything can kill ya etc [insert favourite Crocodile Dundee quote here].
Anyway, crawlies are the norm here, and we don't get them. Rats are occasionally caught by 1 of the cats, but always from outside.. In in the 'burbs, but it's an older, 'leafy' 'burb.. Plenty of foresty bits around, and a National Forest just up the road, like 2 minutes away..
This place is too small for us not to notice a rat living here!
Sounds like your old fridge is probably just better made, and thus repairable, unlike my newer, "disposable era" fridge.. I might get it re-sealed though... Might fix the bloody door alarms...