I'm glad you were able to find this forum helpful!
Keep coming back and share your snakes more!
I would take him to the vet to get him dewormed at the very least. It sounds like he's been feeding well on the native rodents. Those rodents are most likely carrying parasites, so it's always important to rid your animal of internal and external parasites.
And check him for respiratory illness. It's getting pretty cold these days, so being from Africa, our Falls are rather chilly in comparison.