In article . com,
Mike wrote:

3. Although such fish may appear outwardly similar to wild fish,
after a period in suitable conditions, they do not behave like wild
fish. In many cases being almost tame, and can be caught easily using
various tricks, or completely outlandish concoctions such as power
bait, to which they have been accustomed artificailly. They may also
be easily caught using crushed trout pellets. Many of the flies used
to catch such fish have no counterparts in nature, and are taken by
the fish mainly as a result of their extreme conditioning during
rearing to react to food items in a particular manner. They have been
been conditioned to do so, and rarely possess even a fraction of the
wariness of wild fish. Especialy when in shoals, which they often
maintain until they are caught or die, they are extremely competitive.

This is simply wrong. I have fished for stockers and had a great time
catching 20 plus fish on a dry. The fight aint so great, but catching a
bunch on dry flies sure is. I have caught newly planted fish on dry
flies and nymphs.