  The paradigm that young neutron stars (NSs) evolve as rapidly rotating
Crab-like pulsars requires re-examination. Evidence is accumulating that, in
fact, many young NS are slowly rotating (P ~ 10-s) X-ray pulsars, lacking in
detectable radio emission. We present new results on three radio-quiet NS
candidates associated with supernova remnants, which suggests that alternative
evolutionary-paths exist for young pulsars. These include the 12-s pulsator in
Kes 73, the 7-s pulsar near Kes 75, and the enigmatic X-ray source in RCW 103.
We postulate that such objects account for the apparent paucity of radio
pulsars in supernova remnants.
