The dog lost interest and walked off down the sidewalk.

Within a few years it was clear that the dogs were losing their working ability.

If a dog loses one, well it's still got three to get on with, you know?

The dogs lost his scent on the road further down the hill.

Then the dog lost interest and disappeared back into the hedge.

The dog had lost interest and was heading back towards the kitchen.

But the dog just lost interest and sat down.

In these cases, if the individual stops, the dog often loses interest since the movement has stopped.

Your dogs lost interest and stayed on the ground floor.

Someone's dog, he thinks, lost and wanting to be let in.