Is there a relationship between feces and pink eye?
Should I be concerned that my dog's feces is green?
What causes green moss like feces?
What could be causing thin feces in a dog?
What could be the cause of worms in my dogs feces?
What wild animals bury their feces?
Will my cat die if he has black feces?
The word feces is not truly plural, it can be used in both the singular and plural sense like "mice". You could use the term scat to individualize one set of feces from another.
There is no singular word for feces. Even if it is just one excrement, it is still feces. Though, you could just say poo, or dung, other words that are impolite to say. You get the idea.
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