In Amuzgo (Eastern Otomanguean), the formation of nominal plurals exhibits many realizations, ranging from the simple addition of a nasal prefix (/n-tɛ2/ ‘PL-priesť → [ntɛ2]), to additional initial consonant fortition (/n-sa1/ ‘PL-elote’ → [ntsa1]; /n-ʦəiʔ3/ ‘PL-egg’ → [ntəiʔ3]; /n-ʃo²ʧi2/ ‘PL-griddle’ → [ŋko²ʧi2t]). initial consonant deletion (/n-ʧəm?2/ ‘PL-papeť → [ɲəm?2]), and sometimes also the replacement of the prefixai nasal by a lateral (/n-tsjo3/ ‘PL-bottle’ → [Ijo3]). In this paper, we argue that all of the changes above follow from two main principles: (1) The underlying contrast between the two pairs of phonemes characterized by a delayed release - the [+anterior] /s, ts/ and the [-anterior] /ʃ, ʧ/ - must be maintained; and (2) /s, ʃ/ cannot be faithfully realized after [n]. These principles, in interaction with other considerations, lead to an establishment of a push chain (/s/→/ts/→/t/) among [+anterior] consonants and to a case of saltation (/tʃ/→tʃ/; /ʃ/→/k/) among [-anterior] consonants.