DO NOT USE oil with your snake, this is the worse thing you can actually do and yes I am well aware of what some people do or claim that works, does not mean it's true or not dangerous and oils are dangerous for snakes.I will have you know that I have used a similar method including eucalyptus oil and it has so far worked a little with one of the snakes so I would like to try another method with the other before scheduling for a vet.
For the rest it's YOUR choice you can just keep waiting rather then get a culture and the right antibiotic, ultimately your snakes, you wanted advice you got it.
Sometimes what's right and what you want to hear are not the same thing, and that's just the bottom line.
Apparently not a first. https://ball-pythons.net/forums/show...ytril-use-help
Is this the same animal or do you just keep having RI because if it the same it's been long enough (Nov 2016) and if not the same animal and you keep having RI there is definitely some issues that need to be addressed. (That many RI in such a small amount of time in several animals means there is something terribly wrong that need to be handled)