I thought Vitamin K (not C) was the antidote to coumarin rat poisons like warfarin but I'm a rusty doctor.
Vitamin K is abundant in trendy 'superfoods' like kale and broccoli.
Could be, in fact thinking about it as Vit K is involved in blood clotting, most likely. My mate probably got his "C" and "K" mixed up.
A few years ago, a depot I was working with had a rodent issue in the mess-room, they were also skint so I pointed out to the Finance guy that getting some "working cats" from Cats Protection was much better value for money than a permanent contract with a pest-control company (which are expensive).
So, we got a feral cat, the workshop chaps warmed to her very quickly when they saw her catching rodents. (She would line the dead ones up neatly out the back
) ). Soon the rodent evidence in the mess room went away and that cat was the best looked after cat ever- nice bed-box-den, tasty food and before long she wasn't very feral any more. She still caught loads of rodents, but liked sitting in the sun with the lads at their dinner. My team ensured there was always a supply of cat necessities and we had a voluntary roster to make sure she was looked after (food etc) over the holiday periods. Her photo was on the notice board as the "head of pest control."
Then (a couple of months after I left the place having been made redundant) a smart-ass young kid manager decided the cat was "unhygienic" and must be persuaded to leave- he told the workshop lads anyone caught feeding her would be disciplined. The cat was such a pet by now she had a new home within the week and the rodents were back within the month (and as with most such seagull managers, after making a noise and mess everywhere this chap left- but the rodents didn't).
GC