Further, the authors stated: «Coppinger and Feinstein (1991) point out that young animals of many species of canid tend to bark more frequently than adults. (canismajor.com)
For example, male aggression toward females - something that appeared rather common even in the reproductively successful island foxes - is virtually unknown for other canid species, in which males tend to be very solicitous to females, especially during estrus and pregnancy. (nps.gov)