You have to read down to the foourth definition of wrangle to get the author's meaning in this case (to herd and care for animals).
Student or Learner
43)When I arrived at her house, Mrs. Davis was trying to *wrangle up her dogs that had somehow gotten out of the yard. I left the pizzas in the car and ran to assist her with the dogs. She was very grateful and I gave her the pizzas and read out her total of $67. At that point, she reached.
What does "wrangle up" mean here? A dictionary says "argue with someone", but the meaning seems to be "grab and hold up".