I bought a large female off cl and didn't notice the bad lumps near her vent. I've been giving her baths and got her hydrated, she craped out a large marble sized urate, but still has mmore to go and hasn't let them go. Anyway it's been over a month and I'm going to give her a rat pup dipped and injected with oil, but don't have any mineral oil. Is it ok to use the castor oil I have?