Rats are always a problem too control when feed it so regally available but they need to make things more hygienic and safe from contamination. Its a constant battle I have had and one I know will be a forgoing thing.
Mine do get sunflower (limited amount) and they also get nuts still feeding the deli nature 61 and also the number 64
Just a pain in the backside it's gotten so popular as they keep running out of stock
@plumsmum have never visited their place before only ever dealt with them online or at the PSUK shows.