41. The latter was also supplied from local quarries and carried in by harnessed pack animals . 42. Its advance was delayed by a shortage of pack animals , medium artillery and mountain equipment. 43. Pack animals by nature, they consider their adopting " persons " to be their pack.44. This placed a large burden on the prospectors and the pack animals climbing the steep pass. 45. The dogs aren't pets, they're pack animals , and couldn't be given away to families, she explained. 46. The domesticated Bactrian camel has served as a pack animal in inner Asia since ancient times. 47. They are descendants of pack animals , and the old mentality sometimes comes out during a race. 48. Dogs are pack animals ; they respond to authority. 49. The loss of pack animals was to cripple several of their divisions during the following year. 50. But practically all the animals in those countries are domesticated and are used chiefly as pack animals .
