| The waste will be run through a methane digester, a tank in which bacteria break down the feces to create methane. |
| Veterinarians diagnose strongyle infection from microscopic observation of eggs in the feces. |
| The birds then obligingly dropped their feces into well-placed plastic flowerpots near popular perches throughout a large, wooded test area. |
| Let her practice flushing the toilet and watching toilet paper or feces disappear. |
| This was considered very sensuous at the time, as filth and animal feces were considered adornments, like sexy lingerie is to modern women. |
| Mercury vapor in the gastrointestinal tract is converted to mercuric sulfide and excreted in the feces. |
