Generally, you might see feces with mucus or blood in it,
bloody diarrhea, or unproductive straining after
passing feces.
Signs of heatstroke include, among other things, excessive panting, fainting /
passing out, a body temperature of 104 - 110ºF, very dark or bright red tongue, seizures,
bloody diarrhea or vomiting, coma, and even death.