我住在一个农场里，那里有许多许多——犬舍到门廊间的小径、房子南面紧贴墙角的转弯处的小道、马匹踩出来的土痕，还有从一扇门到下一扇门之间的小路。
I live on a farm, and we have dozens. The path between the doghouse and the porch, the tight corner around the house on the south side, horse trails, the line between one gate and the next.
贝基·威德和她的丈夫大卫·泰勒在黄石公园附件牧羊。他们养了一条牧羊犬，驱赶土狼、棕熊和美洲狮。
Becky Weed and her husband, David Tyler, raise sheep near Yellowstone National Park. They ranch with a guard dog to ward off coyotes, bears, and mountain lions.
犬猫发生微量元素缺乏症时，出现舔墙、啃土、异食癖、贫血、皮肤病、免疫力下降等症状。
Deficiency of trace minerals will result in licking the wall, chewing the soil, biting the things, anemia, skin disease and lower immunity.
犬猫发生微量元素缺乏症时，出现舔墙、啃土、异食癖、贫血、皮肤病、免疫力下降等症状。
Deficiency of trace minerals will result in licking the wall, chewing the soil, biting the things, anemia, skin disease and lower immunity.
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