You might want to think twice the next time you put some bacon under the grill . A video has revealed just how smart pigs are , which may leave some people a little more reluctant to tuck into a choice cut of pig . The latest evidence of the creature 's intelligence shows a pig sorting shapes without any human intervention . Moritz the pig in Berlin , Germany has solved a complex puzzle . The pig did it without any help from a human . In a video ( shown ) the pig puts coloured shapes into a wooden block . Recent research also revealed they have empathy like humans . The video was recorded by Nicolle von Eberkopf , who lives in Berlin , Germany . In a video , Moritz the pig places coloured pig-shaped blocks in corresponding coloured holes on a wooden board . The pig does this using its mouth , without any help . ‘ Animals are an important part of our society , ’ said Ms von Eberkopf . The sign of pig intelligence follows research earlier this year when scientists discovered that the creatures may be capable of empathy - a characteristic thought to be almost uniquely human . In an elaborate experiment , experts discovered that pigs shared the stress and happiness of their penmates . This findings by Wageningen University in the Netherlands suggest that swine respond to each other ’ s feelings , and adds weight to the argument that the practice of separating the animals in farms is especially cruel . The pigs were trained either to anticipate happiness or distress , by playing them music and either rewarding them with a pleasant treat such as chocolate raisins and a roomy house filled with peat , or putting them in a stressful situation , such as keeping them in isolation in a small pen . Untrained , ‘ naïve ’ pigs were placed in a pen with a pig conditioned to expect happiness , or one that expected discomfort . All the pigs were then played the same music – a piece by Bach - used in training . Some of the trained pigs showed that they anticipated what may happen to them , either by displaying happy behaviours - such as wagging their tails and barking - or signs of stress , such as keeping their ears back , urinating and defecating . Despite most of the trained pigs failing to react at all , they were still taken to another pen , leaving the naïve pigs behind , and were either rewarded or punished , depending on their training . The naïve pigs , which could not have known what lay in store for their penmates , reacted to the trained pigs ’ behaviour anyway . Asian elephants show concern for others when they are stressed , using their trunks to caress the suffering elephant and emit a soft 'chirp , ' Discovery recently reported . Consoling elephants put their trunk into another elephant 's mouth so they are vulnerable , perhaps showing they are there to help . Crows and ravens are also known to be emotionally intelligent , with researchers at the Konrad Lorenz Research Station in Austria finding that the birds comfort others that are stressed after a fight . Ravens sit next to the distressed bird so their bodies are touching and sometimes preen it . University of Portsmouth research has shown that orangutans ( stock image ) can be so full of empathy that they take on the moods of others . When one orangutan laughs , others often join in . Scrub jays - another member of the Corvid family - have 'funerals ' for deceased friends , according to research by the University of California , Davis . They fly over the dead body , wailing and screeching , which may be a sign of grief . Mice have been shown to detect pain among others but only appear to console their family and friends . Garet Lahvis , an assistant professor at Oregon Health and Science University , said : 'Mice are capable of a more complex form of empathy than we ever believed possible . ' Similarly , rats are believed to be able to respond to excitement , fear and anger . They even help each other out with no prospect of a reward , according to Washington State University . The rodents also show that they enjoy being tickled and playing by giggling . Gorillas not only care for each other but have even been seen to care for dolls . University of Portsmouth research has shown that orangutans can be so full of empathy that they take on the moods of others . When one orangutan laughs , others often join in . The sign of pig intelligence follows research earlier this year when scientists discovered that the creatures may be capable of empathy - a characteristic thought to be almost uniquely human . In an elaborate experiment , experts discovered that pigs shared the stress and happiness of their penmates . For example , when a trained pig showed it was stressed , a naïve pig acted in the same way , by becoming more alert and keeping its ears back . The behaviour was even more noticeable when the untrained animals noticed the behaviour of trained ‘ happy ’ pigs , with the animals becoming more playful and wagging their tails . To test that the animals were responding to each other ’ s behaviour and not simply the music , the scientists played the naïve pigs the tune . They showed no signs of changing their behaviour , indicating they were showing empathy with the trained animals . The findings were published in the journal Animal Cognition .
Moritz the pig in Germany , Berlin has solved a complex puzzle . The pig was able to carry out the task without any help from a human . In a video , the pig puts coloured shapes into a wooden block . Recent research also revealed they have empathy like humans .