herd so or sth together meaning

[American slang]
to bunch people or animals together.
  Let's herd all the kids together and take them in the house for ice cream and cake.
  I herded all the puppies together and put them in a box while I cleaned their play area.

• ride herd on so or sth:    [American slang]Fi ...
• herd together:    herd together sb/s ...
• bind so or sth together:    [American slang]to ...