No problem for asking, Leahtor. Grit - small rocks? No, it didn't have the chance to eat to much grit. When it was still ok, i have taken him to parks, when it was grubbing/ scratching earth and sand. Since it was sick, i didn't brought him grit. It's main source of food now it's grains of corn. I observed that corn are quicker absorbed than bread, now. When it was ok, it was inverse - corn assimilated slow than bread.
My mom said that if it has internal parasitic worms, they must be seen in it's poo, like for humans. In charts and on Wikipedia doesn't said that about chickens parasitic worms, it said only blood or eggs can appear. Like i said before, i have seen a few thinks that resemble a parasitic worm eggs. Somebody know more about chickens internal parasitic worms? It could be this the cause?
I don't know what to do with him now. It definitely lacks of power.. it's very very weak. Days before it had the power to rotate it's head around, trying to regain the equilibrium but now it can't do this. It's starts to can't swallow the corn that i give him by "force". All it's happening it's a big crap... i'm so sorry about him.. I let the light open all the time, since yesterday because, in case of ... i guess it's better to happen in light than in dark.. Anyway, it's not in the direct lighting, of course.