Single term deletions
Model:
outcome ~ adult.males + swollen.parous + alphaID + alpha.related +
alpha.subject + (1 | femaleID) + (1 | maleID)

Single term deletions
Model:
outcome ~ male.groom + male.rank * male.party.size + male.related +
male.age.bin + (1 | alphaID) + (1 | maleID) + (1 | femaleID) +
(1 | eventID) + (0 + male.groom | alphaID) + (0 + male.rank |
alphaID)