  Conservation of baryon number as topological charge in effective chiral field
theories imposes a local constraint on the time evolution of field
configurations in the commonly used O(4) model. Possible consequences for the
formation of chiral condensates after a quench from random initial
configurations are discussed. It is argued that efficient dissipative terms are
necessary but not sufficient to unwind the randomly curled-up initial
configuration, before collective motion towards the condensate can grow. The
existence of soliton stabilizing mechanisms will further prolong or prevent
this process.
