WELL? Aka dog3f

Have you?
Seen?
Have you?
He used to wander these streets
From bar to bar
Barking
His leash was long
Sniffing things best not sniffed
Marking territory
But always returned
Loyal pet
Until he met
A bitch with lead as long
And he sniffed what is best not sniffed
And strayed
The fleas prove it
Have you seen this dog?
Beware
For it is an unfaithful hound