As many of us who share our lives with a canine companion or several have long known, dogs suffer from the “green eyed monster” in much the same way we do. And now there’s scientific evidence to confirm our suspicions.
Dogs React Jealously When Owners Pay Attention to Faux DogTwo researchers at the University of California, San Diego conducted a jealousy study with 36 small dogs.1 The dogs were all under 35 pounds and/or shorter than 15 inches. This was so the researchers could more easily control undesirable behaviors. In the group of 36 were 14 mixed breed dogs and a variety of purebred toy and small breeds.
Each dog was videotaped in his or her own home while the owner interacted with a barking, whining, tail-wagging animatronic dog, a children's book, and a plastic jack-o-lantern. The owners were told to ignore their dogs while interacting with the other objects. The videos were then evaluated for aggressive, disruptive, and attention-seeking behaviors from the dogs.
The dogs barked at -- and a quarter of them snapped at -- the robotic dog when their owners petted or praised it. About a third tried to get in between their owner and the stuffed dog. The dogs displayed less of this type of behavior when their owners paid attention to the jack-o-lantern or read aloud from the children’s book.
About 78 percent of the dogs tried to push or touch their owner when the owner was interacting with the fake dog, compared to 42 percent that interfered when the owner was handling the jack-o-lantern. And only 22 percent displayed the behavior when the owner read the children’s book.
Dogs Are Motivated to Protect Important RelationshipsAccording to the researchers, the dogs’ jealousy was triggered by social interaction and not just because their owners were ignoring them to focus on the pumpkin or the book. Also, most of the dogs (86 percent) sniffed the butt of the robotic dog, indicating they viewed it as real.
According to study co-author Christine Harris, a UC San Diego psychology professor:
“Our study suggests not only that dogs do engage in what appear to be jealous behaviors but also that they were seeking to break up the connection between the owner and a seeming rival.
“We can’t really speak to the dogs’ subjective experiences, of course, but it looks as though they were motivated to protect an important social relationship.”
These findings are similar to results of human studies in which babies as young as 6 months showed jealousy when their mothers paid attention to realistic-looking dolls, but did not show jealousy when mom read a book.
“We share a tremendous amount of emotional life with dogs.”Patricia McConnell, an animal behavior expert and best-selling author of several books about dog behavior, while impressed with the UC San Diego study, was not surprised by its findings:
“I think we share a tremendous amount of emotional life with dogs,” she said. “But I have never thought of jealousy as a particularly complex emotion (in animals). Is human jealousy exactly like dog jealousy? I’m sure it’s not.”
The UC San Diego researchers theorize that social animals like dogs and humans might be driven by nature to feel jealous in the face of threats to important relationships.
What we do know for certain is that the emotion of jealousy, when acted upon, can have significant psychological and social consequences. The researchers hope future studies will further explore the triggers and internal drivers of jealousy.

Copied from: http://healthypets.mercola.com/sites/healthypets/archive/2014/12/22/dog-jealousy.aspx

Ever wondered what your dog is REALLY thinking? NSID is working on a new way to uncover the inner wishes of our beloved pets. No More Woof – the new tool to let your dog speak its mind! NSID plans for the introduction of three distinct options, each with their own varied degree of functionality.

"No More Woof"

The NSID NMW Micro
A one sensor No More Woof able to distinguish 2 or 3 different thought patterns. According to NSID, these would most likely include Tiredness, Hunger and Curiosity. This is the best option for those that are looking for something reasonably priced to test out the technology for themselves. The English voice option would be available at this price level. 
Price 65 $

The NMW Standard
This is a more robust design than the Micro. This one uses two sensors that help it to be able to distinguish 4 or more different thought patterns, and it should also be able to be calibrated to function better with different dog breeds. You can also flash new software via micro-USB. Far better functionality and more exactness than the Micro Edition.
Price $300
The NMW Superior
Premium mini-speaker implemented in a golden dog-tag with engraving of your choice. Fully customizable color appearance - let it blend in with your dog’s fur. Algorithmic learning: NMW superior programs itself while in use, always learning more of how your dog thinks and reacts –over time this option let’s your dog speak short sentences (“I’m hungry – but I don’t like this!”).
Price $1200

Finally, we must AGAIN stress that ALL the products are at the first stage and shall be regarded as research support. That said, they will definitely work on a basic level with dogs (and hopefully to some extent with all animals) and we can actually think of no cooler products, and yeah, we're basically building them because we want them ourselves.
Future applications and accessories
- Getting to personalize the device to distinguish even more thoughts, and combination of thoughts, like "Who is that woman, she looks nice!" 
- Using the device to let hurt or disabled pets control artificial limbs or other appliances. 
- Two-way communication. This is The Holy Grail for us. Not only should you be able to understand your pet, let them understand you. A similar device can be hooked up on humans translating our thoughts into dog, or other animal tongue like, oh sweet thought, a dolphin!
- Recognition of advanced thought patterns.
-Uncensored edition: hear your dog spelling out its horny thought. Perfect opener in the part! "Hey Bitch, wanna play?"
- The Pavlovian training kit (With the use of play and classical conditioning you and your pet will understand each other even more. By letting the… (Original instructions by Ivan Pavlov are provided :)