I have a hen that had poo stuck all over her vent and the feathers below. I noticed she had (and still has) an awful smell and she looks like she is struggling to poop, she kinda squats down and makes a sound. Her poo is like dark oval(ish) balls. Ive been giving her epsom salt baths, but I cant figure out the smell and the appearance that shes having a hard time going poo.