In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Q: Online survey of 1,200 cat owners reveals aggression tendencies among various coat colors. 
  
 Recently, veterinarians at UC Davis discovered a possible correlation between feline behavior and fur color. In the research from experts in the UC Davis Veterinary Medical Teaching Hospital, the researchers discovered that cats with calico and tortoiseshell coat patterns tend to be the most challenging and aggressive cats compared to those with less flashy, single-color coats. 
  
 To determine this, the researchers collected data from an online survey of more than 1,200 cat owners. The survey asked these cat owners about their felines’ behaviors, and requested that they choose a color category and written description that fit their pets best. They used a scale from zero to five to assess the frequency of behaviors, such as hissing and biting. 
  
 The study showed that cats with calico and tortoiseshell coat patterns tended to challenge their human companions more and exhibit more signs of aggression. 
  
 “We undertook this research to explore a long-standing assumption among veterinary professionals and cat owners that calicos and tortoiseshells are somehow different,” said Dr. Liz Stelow, a behavioral expert in the UC Davis Veterinary Medical Teaching Hospital. “We looked specifically at aggression and friendliness. They were significantly different from most other coat colors for aggression toward humans, but not for friendliness. 
  
 The study found that cats with these types of fur color are more likely to hiss, chase, bite, swat or scratch when interacting with humans. 
  
 “I have had Nala [a calico cat] for two years now and she’s feisty, but she’s also very lovable and just as good as a companion as my other cat,” said Sarah Ellen, a third-year animal science major who owns a calico cat and a black-coated cat. 
  
 The data also suggests that cats with gray and white or black and white coats are slightly more likely to engage in those behaviors compared to cats of other colors. The research found that cats with solid black, gray and white coats display less aggressive personality characteristics. 
  
 But this discovery does not intend to portray calico and tortoiseshell cats in a negative way. Dr. Stelow said the findings should not discourage people from adopting a tortoiseshell or calico cat; she owns one herself and believes they are great companions. 
  
 “Just because they have a higher incidence [of aggression] does not mean they are a problem,” said Melissa Bain, veterinarian and associate professor of clinical medicine and epidemiology, who worked with Dr. Stelow on the study. 
  
 Written by: Demi Caceres – campus@theaggie.org ||||| Is your calico cantankerous or your tortie a tad touchy? Researchers at UC Davis Veterinary Medical Teaching Hospital say you aren't imagining things. They are. 
  
 The "cattitude" study, recently published in the Journal of Applied Animal Welfare Science, supported what some vets have long maintained -- cats with distinctive patterns tend to be more of a handful than cats with simpler color markings. 
  
 Dr. Elizabeth Stelow, an expert in animal behavior at UC Davis, led the study that focused on the observations of 1,200 cat owners. 
  
 Participants weren't told what the study was about and were only asked questions about the habits and personalities of their cats. They rated the behaviors on a scale of zero to five. 
  
 The calico cat (left) and tortoiseshell (right) are know to be a bit wild at times. (Courtesy Valley Humane Society) 
  
 The findings showed, to put it bluntly, that calicos and torties are more likely to hiss, bite, scratch, swipe at and behave aggressively toward humans. 
  
 That doesn't mean they all do, but that confrontational tendency is more prominent in those cats. 
  
 The survey results also indicated that cats with solid colors are much more mellow and less likely to display the temperaments that can give a cat a bad reputation. 
  
 The theory behind the calico and tortie's spunky attitude may have to do with genetics, researchers say. In both cats, the color combination can only be produced by having two X chromosomes, which make the vast majority of the cats female. Those same genetics may play a role in their personality. 
  
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 Researchers stress that the cats are not dangerous, only feisty, and that people shouldn't avoid adopting them. 
  
 I am fascinated by this study. I've never had a calico or a tortoiseshell cat, but I have discovered a couple of things about the cats I've had. 
  
 A friend gave me a huge siamese cat for my birthday. His name was Andy. He hated me for the first few weeks we were together. At night, while I slept, he used to knock things off the bookcase onto my head. 
  
 He was afraid of nothing. Before I knew better, I used to let him go outside for a few hours a day. My house soon was filled with tailless lizards that he would catch and bring in. Once he brought in a child's sock. I was afraid to answer my door for a week. 
  
 When I stopped letting him out, he used to stalk me at night. 
  
 Andy, a classic seal point siamese, turned out to be a loving cat and we became best friends. When he died, my heart broke, but the house was so empty without a cat, I knew I needed another. My mom, who was living with me then, decided she wanted to get a cat, too. 
  
 I picked another siamese, a female named Sarah. My mom chose a large Maine coon that she named Matt. 
  
 Sarah, a lynx point, turned out to have even more attitude than Andy. She showed her displeasure with a snarl and a flash of thin, razor-sharp claws. 
  
 Matt, who had gray tabby markings, was a gentle giant. I've never seen a more affectionate cat. 
  
 So how about you? Have you noticed similar personality traits in your cats based on breed or coloring? Do the study findings reflect your own experience? 
  
 Do you tend to prefer cats of a certain color because of those traits or do you like the variety? 
  
 Tell me out your experiences, good and bad, and I'll write another column comparing our stories. 
  
 Contact Joan Morris at jmorris@bayareanewsgroup.com. Follow her at Twitter.com/AskJoanMorris. Read more of her Animal Life columns at www.mercurynews.com/animal-life. |||||
A: 
If your feline friend has a bad "cattitude," the color of its fur might be a factor. Researchers at UC Davis have found a correlation between a cat's markings and its level of feistiness, the San Jose Mercury News reports. Calicos and tortoiseshells are more likely to be aggressive—to bite, hiss, scratch, or swipe—when interacting with humans, according to the study published this month in the Journal of Applied Animal Welfare Science. It may have something to do with the cats having two X chromosomes. And it's not a universal designation, the News notes, but the behaviors are more prominent in those cats. Also, the researchers say the results shouldn't be interpreted to mean that cats of those colors are dangerous; they're just feisty. Researchers based their findings on the results of an online survey of more than 1,200 cat owners, the California Aggie reports. Respondents answered questions about their cats' behavior—using a scale of zero to five to rate frequency of particular behaviors—and provided their feline's color and pattern. Researcher Liz Stelow tells the Aggie that the study aimed to explore the "long-standing assumption" among vets and cat owners that "calicos and tortoiseshells are somehow different." As it turns out, "they were significantly different from most other coat colors for aggression toward humans." On the flip side, the study found that cats with solid black, gray, or white coats are less aggressive. Researchers want to be sure their findings don't discourage people from adopting calicos and torties. Just because they're more aggressive, another researcher tells the Aggie, "does not mean they are a problem.” (Of course, your cat might secretly want to kill you.)