
be best to have a look on some of the agility sites really. then you can hopefully find a pup with some lines that you like & admire.
HD is more common in collies than you would think,so make sure the parents are scored & have good scores (although this is no guareentee on the pup having good hips...it does improve the chances!)
also alot of people for agility want BCs nowdays are KCbreed or isds reg so they can compete aboard,so if this is of a interest to you check which register the parents are on & if the pups will also be on it. if the parents are only on the activites register then the puppies will only be able to be registered as WSs (fine if you only want to compete in the UK)
best of luck!