Depends what ingredient it is. Some ingredients cause diarrhea in pretty much all species, others are specific to one or to an individual, i.e. sensitivities or intolerances causing the diarrhea rather than the ingredient.
The dark cooking chocolate we get here is pretty plain, no shame in...
Good on you, always good to avoid collateral damage when possible. As for traps, please be careful with them too, chooks and dogs etc can also hurt themselves in them so if they're not no-harm/live trap sorts, (and even sometimes if they are) they can be dangerous to have in easily accessible...
Depending on the species and how soft the dirt or blockage is, some snakes will manage, but generally they just use holes rodents have dug.
lol, good luck with trying to stop rodents getting in... It's often completely futile. You're generally better off trying to remove the food sources...
Very unusual for a chook to leave a yolk and the shell... I expect it's a snake or monitor lizard.
If you add your country to your profile info it helps people with providing location specific info, otherwise you'll regularly be asked where you live, because the differences in laws...