Don’t mess with that person, she’s a Southern witch
Sounds like three euphemisms for drugs.
In the Catskill/Shawangunk Mountains of New York, no less! 
I saw a car sticker today that said
“If you don’t talk to your cat about catnip, then who will?”
Now here’s an amusing sign (at a canine agility competition)
English was obviously not their best subject in school. But they did get their point across with humor. So good enough I suppose.
It may not have been meant as humor. I think it’s just standard dog show language; it just looks funny if you’re not thinking in that language.
Female dogs in season drip blood. So some people put pants on them to keep their floors clean. Whether they call them pants or panties I don’t know; but it might well be panties.
Not only do they drip blood, but every male dog in the area becomes . . . distracted, to put it mildly.
hey, why stop at Schmutz, when you can also steal Dreck!
Yep, standard dog show language.
I’m not arguing terminology. The correct grammar would have been
No bitches in season, not even with panties, are allowed in the building!
The “are” might reasonably be elided on an imperative sign. But not the commas; their absence completely alters the meaning into gibberish.
Heck, just change the order.
No bitches in season
allowed in the building
not even with panties.
Kinda poetic that way.
Dog show haiku.
You are a genius!
Haiku would be:
Bitches in season
Not allowed in the building
Not even with pants
Which, I presume, is why they’re not let inside even with pants on.
Hehe, I thought about the haiku angle, but then I looked up the whole 5-7-5 syllable thing, and saw a bunch of folks saying that was a misconception and the Japanese idea was sounds, not syllables. And so I abandoned it.
Then I thought about the flow of my rearrangement, and it seemed to be a pretty could blues bit, and I entertained myself for a few minutes singing:
My mamma done told me
No bitches in season
allowed in the building
not even with panties
the boy dogs they do get
so very distracted
But that’s not going anywhere, so I’ll stop. 
ETA, I also did a beat poetry version in my head. I won’t subject you to that, though.
I learned those canine facts upon seeing the “doggie diapers” as a young child. And somehow it got mixed up in my older-child mind with more recently acquired facts about human menstruation.
So I was under the impression that human females could only become pregnant while menstruating, and consequently was baffled by talk about the importance of birth control, because it seemed like it would be trivially easy to just avoid impregnation-type activities during your period.
I remain eternally grateful to the seventh-grade Health Ed teacher who cleared up that, um, misconception before it had any life-altering consequences for me.
Not a dog, but a cat. Or rather, kitten.
My female kitten loved to run up and down my piano. It was fun to watch and hear; literally, “Kitten on the Keys.” Then, the time came that nature demanded, and she left “things” on my beautiful, ivory-keyed, antique piano. I cleaned them up quickly, and closed the lid so she couldn’t play my piano any more, and got her to a vet.
She still loved to play “Kitten on the Keys,” but my beautiful ivory piano keyboard was saved from staining.
[end hijack]
I put it in a haiku generator:
Bitches in season
Forbidden from entering
Pants won’t save them now
Can’t blame them for this
Their bodies speak, can’t resist
Nature’s call, so strong
Scent carries, warns all
Dangerous, yet mesmerizing
Bitches in season
Not bad?
Pretty darn good actually.