iStock
iStock

Genetic Alteration Keeps Chickens From Caring For Their Eggs

iStock
iStock

Commercial chickens do not make good parents. It’s not their fault, though. They’ve been bred to care as little as possible about their offspring. 

Chickens are brood animals, and they have a natural tendency to sit on the eggs they’ve laid to keep them warm. But this tendency, called broodiness, is a problem for farmers who raise chickens for eggs. The more time a hen spends trying to raise the eggs she’s laid, the less time she spends laying new ones. So farmers have bred broodiness out of commercial chickens. 

There's a genetic basis for chickens wanting to take care of their offspring. One particular gene—scientists don’t know exactly which one, but a 2010 study suggests the dopamine receptor D1 (DRD1) gene could play a role—controls whether a hen wants to pluck her own feathers and use them to keep her nest egg warm, or whether she would rather be preening or roosting far from her offspring. When that gene gets bred out of a chicken breed, the hens are more likely to be indifferent to their eggs. 

The mutation likely occurred naturally at first, in White Leghorn chickens, but has since been selected for in other breeds, because bad parenting means good money for chicken farmers.  

[h/t: io9]

nextArticle.image_alt|e
Mark Ralston, AFP/Getty Images
How a Hairdresser Found a Way to Fight Oil Spills With Hair Clippings
Mark Ralston, AFP/Getty Images
Mark Ralston, AFP/Getty Images

The Exxon Valdez oil tanker made global news in 1989 when it dumped millions of gallons of crude oil into the waters off Alaska's coast. As experts were figuring out the best ways to handle the ecological disaster, a hairdresser from Alabama named Phil McCroy was tinkering with ideas of his own. His solution, a stocking stuffed with hair clippings, was an early version of a clean-up method that's used at real oil spill sites today, according to Vox.

Hair booms are sock-like tubes stuffed with recycled hair, fur, and wool clippings. Hair naturally soaks up oil; most of the time it's sebum, an oil secreted from our sebaceous glands, but it will attract crude oil as well. When hair booms are dragged through waters slicked with oil, they sop up all of that pollution in a way that's gentle on the environment.

The same properties that make hair a great clean-up tool at spills are also what make animals vulnerable. Marine life that depends on clean fur to stay warm can die if their coats are stained with oil that's hard to wash off. Footage of an otter covered in oil was actually what inspired Phil McCroy to come up with his hair-based invention.

Check out the full story from Vox in the video below.

[h/t Vox]

nextArticle.image_alt|e
Bristly
A New Chew Toy Will Help Your Dog Brush Its Own Teeth
Bristly
Bristly

Few pet owners are willing to sit down and brush their pet's teeth on a regular basis. (Most of us can barely convince ourselves to floss our own teeth, after all.) Even fewer pets are willing to sit calmly and let it happen. But pet dental care matters: I’ve personally spent more than $1000 in the last few years dealing with the fact that my cat’s teeth are rotting out of her head.

For dog owners struggling to brush poor Fido’s teeth, there’s a slightly better option. Bristly, a product currently being funded on Kickstarter, is a chew toy that acts as a toothbrush. The rubber stick, which can be slathered with doggie toothpaste, is outfitted with bristles that brush your dog’s teeth as it plays.

A French bulldog chews on a Bristly toy.
Bristly

Designed so your dog can use it without you lifting a finger, it’s shaped like a little pogo stick, with a flattened base that allows dogs to stabilize it with their paws as they hack at the bristled stick with their teeth. The bristles are coated in a meat flavoring to encourage dogs to chew.

An estimated 80 percent of dogs over the age of 3 have some kind of dental disease, so the chances that your dog could use some extra dental attention is very high. In addition to staving off expensive vet bills, brushing your dog's teeth can improve their smelly breath.

Bristly comes in three sizes as well as in a heavy-duty version made for dogs who are prone to ripping through anything they can get their jaws around. A Bristly stick costs $29 and is scheduled to start shipping in October. Get it here.

SECTIONS

arrow
LIVE SMARTER
More from mental floss studios