Perfect.

I don't know in the US,
but around here, i can always send my samples to a specialized vet by mail.

I get the stool, put it in damp cottonwool, put it in a well closed film cannister and put it in the mail.
The mail delivers the next day, so i'll get the results within 2 days from collecting.
The vet can also tell what to use and in what dosage.
They might send it by mail or give a prescription so you can collect at a nearby vet.

If not pooping, it's difficult ofcourse.
Most of the times, letting them sit in some luke warm water for a minute or 5 will
help them.
At least, for me it works most of the times.