Ain't that a bitch?

It could be, the op didn't say.

This FML is faker than my girlfriend's orgasm

#1: you, my friend, have just made my day. You deserved the first comment.

Officially less attractive than a dog

Or she could have meant he was just complementing her on the dog and not her, he could have felt that she was being a bit conceded thinking he was talking about her

That's not too bad. I mean, have you seen how some dogs look?

Hopefully your dog didn't go hotdogging after that...

"Who's a good girl? Yeah that's right YOU are!" That ring a bell?

That's discouraging.

He sounds like he's barking up the wrong tree, show him a ruff lesson OP.

Someone who's been desperately trying to use that juvenile pun on girls for ages ("You're pretty... Haha, I was talking to the DOG!" must be one of the oldest jokes to pull on strangers).

Better keep your dog close, I heard there was a dog pervert on the loose in your area OP.

Should have just played it off like you were thanking him for complimenting your dog. Lol.

Would it have been worse if he called you a good girl and pet you after?

Not if he petted her in the right places.