Oh, I know you didn't say it was dominance, but Blackrose said that she thought it was dominance, and I needed to dispel that myth.
Aside from these food deliveries, there appeared to be an ownership zone (Mech 1970) around the mouth of each wolf, and regardless of the rank of a challenger, the owner tried to retain the food it possessed, as Lockwood (1979) also found with captive wolves. Wolves of any rank could try to steal food from another of any rank, but every wolf defended its food (Table 6).
-From L. David Mech's "Wolf Status and Dominance in Packs" report.

Basically, my point is that it's not dominance, but it is an issue of obedience training and Chloe's perception of "what will I get in return for giving up my resources?"