This morning I went to give my chickens food as usual, I noticed an older hen looking sick and tired. I checked for possible crop infection but its empty. I then check if she is egg bound but noticed the belly swollen and not stiff enough to be egg bound. Just swollen. Poo looks watery in normal color. Temp 28-30 degrees. What could be the cause of this? I don't know if it was the garlic I gave them yesterday or the new vitamins I got from my other vet.