No single dog or one hundred dogs are worth even one human life.

Not even a single dog had started barking at their proximity.

However, this has recently been reduced to only 35 dogs across the service, leaving many areas without a single dog available.

This involved being pulled face first through the snow by single minded dogs desperate to get moving.

Three domesticated horses also inhabit the island, along with a single dog.

Across town, a single dog barked, soon joined by others.

Must we choose a single "top dog" of the literary world?

Like being the best flea, among all the fleas on a single dog.

Then I noticed a single dog away on the left.