You may already know this but it bears mentioning. Boa constrictors are known carriers of IBD and no matter how long you quarantine them, they should never, ever come into contact with other species. You also will need to be even more careful with quarantining because if you ever get a mite infestation and a boa in the collection is a carrier of IBD, it can spread that way. I know a lot of people keep boas along with other species without issues but you just have to take the proper precautions.