Snakes will at times get this. I have a few females that when htye have the runs will release loud fart sounds as well. And then next bowel movement be perfectly normal. Has a lot to do with digestion, as in are they on the cool side more while after a meal or hot side.

Happens more with frozen feeders due to bad rodent, not thawed out properly.

What works best for any treatment for parasites is panacur and flagyl. Both very inexpensive and panacur is bought at stores other needs prescription. Neither will harm the snake but actually benefit their feeding responses.

I wouldn't sweat this bowel movement right now. Their just like every other living thing that at times has runny stools.