I've fed Pylox one size bigger out of desperation before, and it didn't have any side effects. Not sure about the proportions but your snake and the jumbo mousr look about the same size when I fed it to Pylox. All I did was skip a meal the next week to let her fully digest, then I just continued feeding normally, so maybe you could try that. Not sure if this will work but I hope it helped in some way!
Sent from my vivo 1601 using Tapatalk