We have three cat-related items today, the first from the Journal of Chemical Ecology. Click to read it, and after doing so you might consider giving your cats silver vine rather than catnip.
Silver vine (Actinidia polygama) grows in the mountainous areas of NE Asia, and has long been known as a cat attractant. Here’s a photo from Wikipedia labeled, “A silver vine plant with the eponymous silver markings on its leaves.”

Wikipedia says this about its effect on cats. (it has other medicinal and culinary uses for humans):
Silver vine has long been known to elicit euphoric response in cats. The reaction to silver vine is similar to the response to catnip, but appears to be more intense. Silver vine is an alternative to catnip, and many cats that do not react to catnip will respond positively to silver vine powder made from dried fruit galls. Typical behaviors include rolling, chin and cheek rubbing, drooling, and licking. The effect usually lasts between 5 and 30 minutes, but afterwards cats exhibit a refractory period lasting roughly an hour during which they are unresponsive to further dosage.
A study published in January 2021 suggests that felines are specifically attracted to the iridoids nepetalactol and nepetalactone, present in silver vine and catnip, respectively. The compounds were found to repel mosquitos, and it is hypothesized that rubbing against the plants provides the cats with a chemical coat that protects them against mosquito bites.
That sounds weird but may be true: cats’ behavior may have evolved so that the moggy became attracted to the plant and rubs all over it: those cats who behave this way get fewer mosquito bites. I suspect that’s wrong, though. Do cats get malaria or other reproduction-reducing maladies from mosquitoes?
Here’s a gif from Wikipedia of “A cat under the influence of Actinidia polygama“. It’s baked!

Here’s the paper’s abstract:
Chemical cues that appear potent in controlled laboratory bioassays do not necessarily function as effective behavioural cues under natural conditions, where animals can freely approach or ignore stimuli. How chemical detectability translates into voluntary behavioural engagement, therefore, remains an important unresolved question. Plant-derived semiochemicals provide a tractable system for examining this issue because the same compounds can be presented either as intact natural sources or as purified chemicals. Domestic cats (Felis silvestris catus) show a characteristic self-anointing response to iridoid-producing plants, including catnip (Nepeta cataria) and silver vine (Actinidia polygama), both widely regarded as cat-attractants. Here, we tested whether these plants differ in their ability to induce voluntary engagement under free-choice conditions. Free-roaming cats rarely showed self-anointing behaviour (face-rubbing and rolling) toward intact catnip plants, but consistently engaged with silver vine. The same bias toward silver vine was observed in captive cats presented simultaneously with plant extracts. Chemical analyses confirmed that catnip contained abundant bioactive nepetalactone, indicating that weak responsiveness was not explained by a lack of bioactive compounds. These findings demonstrate that chemical abundance and laboratory bioactivity do not necessarily predict behavioural reliability under natural encounter conditions. Instead, whether a cue consistently elicits voluntary engagement may determine its ecological effectiveness as a behavioural cue.
But can you buy silvervine, and is it dangerous? The answer to the second question is a firm “no”; vets say it is safe and nontoxic. The only dangers are possible ingestion of chew sticks if you buy silvervine in that form, and some stomach upset if the cat ingests too much. Here’s Grok’s summary:
Silvervine comes in safe forms like powder (from the fruit galls), sprays, toys, and the aforementioned sticks. Powder or sprays are often sprinkled on toys, beds, or scratching posts. Some products are designed for light ingestion.In short: Silvervine is one of the safest and most effective plant-based enrichments for cats. It’s widely recommended by vets as a catnip alternative with an excellent safety profile. If your cat has any pre-existing health conditions, it’s always wise to check with your veterinarian before introducing new toys or treats, but for the vast majority of healthy cats, it’s perfectly fine and enjoyable.
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The Good News Girl reports on something that cat cognoscenti have known for a long time: Disneyland is populated by over 200 feral cats recruited to keep the rodent populations down (not Mickey or Minnie, I hope!). Here’s her report, click to hear:
Here’s a longer but good video (6-minutes) explaining the origin of the cats and their care (they get food and veterinary care, and are also trapped and neutered). Kittens or overly familiar cats get adopted out.
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Finally, in one Indiana city, at one time seven years ago, you could pay off parking tickets by giving the cops food for cats! I saw this on FB and decided to check it out:
Here’s a 2019 article from the Washington Post about the program, though my investigation showed that this program operated only in Indiana in 2019 and is no longer in practice. In some places, however, you can pay tickets by giving food for homeless people.
An excerpt:
To ease the pressure, police created a trade-off: For five days in July, people could pay for their parking tickets by donating to the shelter the equivalent value of cat food or litter. Residents who brought their donations to the police chief’s office with a receipt proving the value got their tickets wiped away. A police officer’s daughter works at the shelter and had made the department aware of the organization’s need.
Muncie is among cities across the country that are opting temporarily to accept charitable donations in lieu of monetary payments for parking infractions. From Anchorage, to Woodstock, Va., municipalities are writing off tickets in exchange for school supplies or cat litter — a way to fill a community need while lessening the sting of getting a ticket. Some cities offer a discount to people who pay with a donation, while choosing the donation option in other municipalities simply allows the payer to feel good.
In Muncie, about a dozen people made donations to pay for roughly $600 in parking tickets, Winkle said. Only offenses that didn’t pose a safety hazard counted: Donations couldn’t resolve a moving violation or a ticket for parking in a handicap spot. Most tickets that people paid with donations were worth about $25 each and had been issued for parking too long in a certain zone, Winkle said.
From the CNN article above:
What’s the cost of a parking ticket in Muncie, Indiana? For a few days in July, it was a cat food or supplies donation for a local animal shelter.
In an effort to help the Muncie Animal Care and Services Shelter, the Muncie Police Department asked violators to pay their parking tickets in cat food.
The request came after a couple of officers toured the shelter and found that it was running short on supplies to care for over 350 cats and kittens.
“If you have a $25 parking ticket, you can bring up to $25 worth of cat food or litter to the Clerk’s Office, and you can get your parking ticket to go away with the exchange of the donation,” Officer Jamie Brown said on a July 15 video shared by the police department on Facebook.
Although the offer ran only from July 15 to 19, the department quickly learned that people will do practically anything when little balls of fur are involved.
“This room was almost empty before we started! Most of the folks that donated didn’t even have parking tickets,” Muncie Police said in a tweet with a photo of all the donations.
. . .”I don’t know if the police department plans on doing this again, but we’re incredibly grateful to them and the community. Their response was overwhelming,” Ashley Honeycutt, the shelter’s office manager, told CNN.
I think they need to reinstate this program!
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Lagniappe: A famous cat in a riad (a fancy Moroccan house converted into a boutique hotel). Click on the screenshot to read more,. but I’ve put the whole text below:
A small riad in the Marrakech medina has built a wall display in its entry courtyard out of guest reviews. The reviews are not about the riad. They are about the cat, an orange tabby named Mishmish, who has been working the front gate for about six years.
The owner started noticing the pattern when his bookings began increasing for reasons he could not initially explain. He pulled the reviews.
A representative selection: “Mishmish was very professional.” “Mishmish escorted us to our room and approved.” “The location was good but Mishmish was the highlight of our trip.” “Mishmish let me cry in the courtyard for a long time and did not say anything.”
The owner printed his ten favorites, framed them in cheap wooden frames, and hung them on the wall above the reception desk. Mishmish now sits underneath the display like a portrait subject seated beneath his own gallery.
Booking inquiries now routinely ask whether he will be on duty during the guest’s stay.
If you want to stay at this place, here’s how to do it (from Grok):
Riad Julines is praised overall for its clean, charming traditional Moroccan decor, friendly staff (like hosts Raja/Raga and Daniel), excellent breakfast on the terrace, indoor pool/terrace, and peaceful vibe despite the central location. It’s a boutique-style guesthouse that feels like a home.If you’re planning a stay and love cats, this riad is a great match—many reviews note how the resident cats enhance the experience. You can find it on Booking.com, TripAdvisor, or by searching “Riad Julines Marrakech.” Note that cat policies can vary, so confirm directly with the riad if you have allergies or preferences.
h/t: Reese





Great stories. I just went to the Amazon website and bought some silver vine sticks. Our cat loves the stuff. I bought all the sticks in the past but somehow they disappeared sometime ago and I forgot about buying new ones. So thanks for the referral. They were a real hit when I had them before. I think I need to move the couch and the bed to find where they disappeared.
Thanks!
THe only common disease cats get (as far as I know, ans as far as a 60 second search tells me, including Claude) from mosquitos is heartworm. But I would suspect a primary benefit is that mosquito bites itch and may be a route for other infections, so reducing bite frequency would carry health benefits beyond mosquito vectored disease.
I can attest to cats’ liking for silver vine from first-hand observation! I once caught one of our cats (long since deceased) playing with a freshly cut vine of a closely related species (i.e. kiwifruit – Actinidia chinensis) that we grew in our back yard. She was lying on her side in the sunshine, holding the end of the vine in her front paws and slowly rubbing it back and forth along her mouth. She wasn’t acting out like the cat in the video, but she did have a relaxed and very vacant stare!
None of the cats I’ve served as an adult was at all sensitive to catnip. Since I’m fond of mind-altering substances myself, I was disappointed they couldn’t share the enjoyment. I so wish I’d known about silver vine.
Interesting. Every cat I’ve owned loved catnip. They weren’t purebreds, if that’s a factor.
As a data point, none of my cats were pure-bred. They were adopted from shelters.
You got me curious, though, so I asked google what percentage of cats lack the gene for sensitivity to catnip. The answer was between 25% and 50%. So, if my math is right, the odds that I would have the (minor) bad luck to get 4 unrelated cats in a row that were all insensitive to catnip was pretty small: between 3% and 6%.
I presently have one (15 years old, indoor since he was four months) that is deeply into catnip, and one (approx 7 to 10 years, outdoor the entire time, abandoned by former neighbor 3.5 years ago) that has no reaction to catnip nor to silver vine.
Kinda wish the outdoor boy like it, as I have several plants– pollinators love them as well– and it would help him keep bite free.
I had never heard of cats’ reacting to silver vine, so mine have something to look forward to, although almost all of them through the years have had the catnip gene. A couple reacted to it only as something green to chew on, without the more typical reaction. One was a “mean drunk” who became very aggressive and had to be isolated when he got catnip.
It would be nice if more police departments would adopt the policy, at least occasionally, of allowing people to pay off small fines with cat food, as animal shelters are always in need of contributions to feed the animals in their care.
Another delightful Caturday!
I’ve offered valerian to cats, but this is the first I’m hearing of silver vine. I assume the “dangers” outlined in the following mockumentary about catnip apply. “Catnip: Egress to Oblivion?”:
https://youtu.be/3scQ0wq5zLE?is=OTBXDud_kxqrc_Le
Don’t confuse silver vine with Silverlace vine (Fallopia or Polygonum auberti). SilverLACE is very invasive, to the point where you are cautioned never to plant it in the ground, but restrain it in pots. Good luck there.
Love the stories! Interesting about silver vine. I’ve always wondered if these kinds of “medicinal” plants may be harmful to cats. They sure look like they enjoy it!
I think it’s a great idea for parking tickets to go to charity—so long as the police force is well funded and and do without the revenue from tickets.
And, Mishmish looks quite regal at her station.
A good Caturday. With my cats, over many years, I have seen variable responses to catnip. Silver vine, eh? This one is intriguing. Thanks also to Ray Little above for the warning re Silverlace vine, very different from Sliver vine — Silverlace, a knotweed, is planted as an ornamental with good intentions but bad ecological results.
One of mine LOVES pressed catgrass.
0 for 5 cats with silvervine sticks. Local cat likes the occasional catnip but not crazy. Likes valerian more.
Our elderly rescue cat is unmoved by catnip, but she just loves silvervine – she rolls all over toys stuffed with it, and enthusiastically eats it when it’s presented as a dried herb (we have a big tub of Willow’s silver vine leaf). I hadn’t heard of it until moving to the UK, where European friends introduced us to its joys.
I’m fascinated to learn it is related to kiwifruit.
The benefits of so-called gender-affirming care have been debunked time and again. On the contrary, it is harmful. The most important evidence is the British Cass Report. But Mahdami clings to it because he does not want to alienate his followers (i.e., gender activists and the ideologically contaminted queer community).