Agree. I have found NO rat/rodent killer/poison/pellet/cake that is poultry/other animal friendly- at least here in the North American system. (the user you are referring to is in Greece)
Even if the birds eat the poisoned (alive or dead) rodent, it will kill them as well. It is indiscriminate.
Let me put this one to rest right now.
First: - The job of this stuff is to KILL THINGS - SO NEVER ASSUME IT IS SAFE E V E R.
However they do have some cheap crap, it's called RidX or something like that. I actually posted a picture of it about a year or so ago bitching about it. It was basically some yeast and flour with a little sugar. The theory was, rodents can't puke, so they eat it, it expands inside them, and well 'pops' their insides as it expands, killing them.
BTW the way the stuff don't work for crap, the damned rats came back asking for cupcakes as dessert

anyways.
With this, since it's being used to KILL STUFF, they are NOT using high quality grains on it, and most likely the stuff that is bad for other reasons. Ergot can be in them which is toxic, etc etc. What about contaminants? Nobody cares because if it kills .. then GOOD !!
NO POISON EVER should be considered safe. Even this crap you get from Bayer, like bug barriers, claiming it's safe in the house, that it's genetically targeted etc. You DON'T KNOW. It has not been around long enough to be able to really tell.
Until the stuff has actually been in use for 30 to 40 years, and people are not dying of it, I will NOT believe ANY claims that it is safe.
I can't even begin to go over how many times, things that were 'safe' for us, a few decades down the road, have been proven to not be. Just look at all the medicinal class action suits.
You MAY be able to save a bird that has ingested this stuff, but you will be needing Atropine, 2PamChloride and some other CBR type antidotes. Things you don't just go into a drug store as a COTS item. It will take you a few weeks and that bird is in bad shape the whole time IF it survives, and only if you caught it in the first few hours of ingesting.
Poisons keep working even after they kill the first host. If you have a poison killed pet. Wrap it tightly in plastic and put in trash or bury it DEEPLY so it does NOT get dug up and continue the killing cycle. Buried preferrably away from any food plants you are planting.
Poison is Poison, It don't care.
Aaron