Yes.. its the normal practive to trim the feathers very short on the birds feet.. otherwise the eggs will get damaged or accidently kicked out of the nest.
Also breeders will trim the feathers around the male and female birds vents to make sure they can mate properly and increase the chances of fertilizing the eggs.
Finally, with birds with ornate or long feathers on their heads and necks, such as Jacobins etc, you should give them a 'hair cut' so they can see better and feed their young more easily.
After getting 2 or 3 batches of chicks from the breeding birds you should stop them breeding to let them rest and recover... during this time they will molt their feathers and go back to their long feathers beautiful looking selves.