Snakes regurg for the following reasons ...

1. Too low temps ... 88 is not hot enough for a hot side ... 82-84 on one side of the cage, 92-94 on the other ... they cannot digest their meal without proper temps and will regurg.

2. Overfeeding ... 2 adult mice is way too much for a young ball python. I have 4 foot adult males that eat 1 adult mouse per week. If you saw "lump" you feed too much and too big which probably caused the regurg.

3. Internal parasites can also cause regurg's .... you should probably have a fecal float done by a vet to rule it out.

There's a good chance that she won't hold down this meal either ... regurg's are VERY stressful on internal muscles and tissue and typically it's best to wait at least 10-14 days before attempting a feeding so that the internal tissue can heal.

Good luck.

-adam