http://leerburg.com/fit-prong.htm talks and shows good info.
The only change I have is I no longer use a collar with such large sized individual prongs. I use the next size down, feel it's MORE control because there are actually more individual prongs around the dogs neck. And they are easier to open and close (what with the collar NOT being large enough to slip over the neck).
Here are the collars to compare:
Both sized collars on dog (not fit properly, just to show difference)

The only change I have is I no longer use a collar with such large sized individual prongs. I use the next size down, feel it's MORE control because there are actually more individual prongs around the dogs neck. And they are easier to open and close (what with the collar NOT being large enough to slip over the neck).
Here are the collars to compare:

Both sized collars on dog (not fit properly, just to show difference)
