The product can't legally be called milk, however, because FDA has standards of identity that specifically define milk as lacteal secretions from a cow. (sciencemag.org)
Specialized lymph vessels, called lacteals, absorb ingested fats and assist in protein distribution. (dogcare.dailypuppy.com)
That federal standard is currently defined as the «lacteal secretions from cows,» which could also prevent alternative mammal milks, like goat and sheep, buffalo, or camel milk from being labeled as milk as well. (organicauthority.com)