The black lab turns to the chocolate and says, "So why are you here?"
The chocolate lab replies, "I'm a pisser. I piss on everything  - the
sofa, the drapes, the cat, the kids. But the final straw was last night,
when I pissed in the middle of my owner's bed."

The black lab says, "So what is the vet going to do?"

"Gonna give me Prozac," came the reply from the chocolate lab.
"All the vets are prescribing it.  It works for everything."

He then turns to the yellow lab and asks, "Why are you here?"

The yellow lab says, " I'm a digger. I dig under fences, dig up flowers
and trees, I dig just for the hell of it.  When I'm inside, I dig up the
carpets.  But I went over the line last night when I dug a great big
hole in my owner's couch."
"So what are they going to do to you?"  the black lab inquired.

"Looks like Prozac for me too”, the dejected yellow lab said.

The yellow lab then turns to the black lab and asks what he's at
the vet's office for.

I'm a humper," the black lab says. "I'll hump anything.  I'll hump the
cat, the pillow, the table, fire hydrants, whatever.  I want to hump
everything I see.  Yesterday, my owner had just gotten out of the shower
and was bending over to dry her toes, and I just couldn't help myself.
I hopped on her back and started humping away."

The yellow and chocolate labs exchange a sad glance and say,
"So, Prozac for you too, huh?"