i think some people expect there dogs to be catching stuff from a very young age, i was one of these people, i remember being out with my friend and dogs, his were working away great and my bitch was stood right next to me and wouldn't leave my side, she was like this for what seemed ages, then she got to around 2 and something just clicked, now shes not the best dog in the world but not much gets away from her, and i would never go hungry,
i guess somedogs just need time to mature and find there feet,,