I'm not an expert.... But I would imagine anything her body doesn't like will 'pass through' quite quickly. I wouldn't worry about the iron thing - dogs in the wild would eat livers wouldn't they? Did she look all pleased with herself? A dog I had many ears ago would look decidedly shifty and 'do sausages' (the face) when he'd been up to anything!
ok so this morning I didn't get my lazy arse up when I normally do and gecko let Lolly out for a wee this morning and then watched telly downstairs for a bit with her
when I came down about 20 mins later I made her her breakfast as normal and she didn't want it
thought very strange but just need to keep an eye on her she went for a walk as normal, had a slightly less firm poo than normal (again I'll just keep an eye) seemed altogether completely fine in herself and has just eaten her breakfast
so then dp goes to give the dogs a bit of liver from the load he cooked up for them to have over the next few days
he asks me where I've put it I've not put it anywhere
yep you guessed it, I didn't realise he had left it out on the counter and lolly has taken it upon herself to eat it all