I have worked with feces (and urine and anogenital seceretions).
My masters was examinining the scent marking behavior and response to scents marks in meadow voles (microtus ochrogaster). Poop pellets were my main currency. I delicately counted each scent mark, traced around each with a pencil (without disturbing the rolling pellets and then let loose another subject and counted traced their scent marks in relation to the previous vole’s marks.

Fun times!!

Most of my career thus far has involved feces. It all started in grad school when I had to gasify poultry litter. After school I moved on to build wastewater treatment facilites. Now I work in renewable energy and my main area is anaerobic digestion. Same sh*t, different day.

Easy, I spent 10+ years looking a feces daily at work. mmmmm roundworms

I weight, dry and measure electrolytes from mice feces as part of my reserach… I guess I deserve this badge.

Hmmm … do invertebrate sources count? I’ve put solvent extracts of caterpillar frass into an HPLC.

Nature center. Scat samples to show the children. Butterfly house full of frass. Various mouse poopies in the storage shed.

Yes indeedy! As an intestinal microbiologist, this is the simplest source for investigative material. We even have great bubbling anaerobic jars of the stuff for our in-vitro work.

Cultivating individual Strongyloides stercoralis in dog feces in microtiter plates. Not that nasty, considering, but very, very tedious.

I’m a parent. ’nuff said.