I actually wasn't there (i was in school), but my father took them to the vet and got them checked out, and said they ran a lot of tests, and blood tests were one of them... & the vet also checked off a list of things to check with reptiles for my dad to take home, and they did a lot of stuff, i wish i were there to video tape it, that would have been very interestingthe only thing that isnt checked off is the fecal exam, and we just have to wait for these guys to poop and we're gonna bring them in...