If it is a bloodhound, it means just that, it's a bloodhound. The minute we start trying to second guess things based on looks (or breed in this case), is the minute we are going to start getting things wrong.
There are no hard and fast rules as to what breed can do what, and by putting things in boxes like that many a trainer or handler have missed out on a lot of great dogs. It is true that there is a large group, largely in the south that some of us refer to as the "good ole boys" that believe that a bloodhound is the only way to go (largely when talking about trailing/specific scent work). This is a very narrow minded way of thinking and very incorrect.
There are bigger issues, like a small dog with short legs is not going to be able to run a trail that is on hot pavement or for great lengths. A dog that has no drive to find anything (a ball, a toy, a squirrel, pick your poison) is not going to have the drive and desire to search for much of anything. KWIM? SAR is much more open than police K9 work. Obviously there are more limits with cop dogs because a cocker spaniel is not going to be very good at taking a criminal down no matter how tough said cocker is!