If he ate for you, then things are going well. Trust me when I say that if anything is wrong a BP is very likely to show no interest in eating at all.
BP's tend to be nervous when they are brought into a new place.... once he eats 3 meals, start handling him every other day for 10 minutes at a time. even if he is aggressive now he should tame down 7-9 months old really isn't old at all as far as BP's go. Be confident when working with him, hesitating only gives them more time to bite you. Give him a month or so, I bet he will settle down and you will learn to love him.