Is this normal?

[billherricks]

I just traded my burmese python for a columbian red tailed boa,I've never owned one before,the guy told me a bunch of stuff I'd like to post it and maybe someone could tell me whats b.s. and whats the truth. First she's about 14-15 inches long and he said she was 8 months old. Is this possible?I called the pet shop and the owner said she was normal she just wasnt power fed. is this right? Also the guy had fed her a mouse that looked way to big for her the day before I got her she threw it up about 2 this morning lastly, What should I feed her? she's really small I dont know what kind of care she had,any help would be appreciated, thanks