I know, this is an idiomatic phrase.
But the buck did indeed stop, albeit not here but at the farm. It's an Anglo-Nubian buck.
An Anglo-Nubian is a breed of domesticated goat. Considered a dairy breed, it is known for high quality, high butterfat, milk production. It is of mixed European, Asian and African origin.
Remember my topic about a government bureau lending livestock (see 'Of good governance') to farmers? The bureau has granted our request for another goat (of different breed) to improve the breed of the goats that we have on the farm today. Introducing a new and better breed will not only alleviate the problem of in-breeding that usually happens but also improve the quality of the livestock's gene pool.
After paying all the required fees, the buck was picked up and brought to its new home. When the quarantine period expires, it will then be allowed to mingle with the ladies of its own kind.