Dog
Workers

In addition to dogs' role as companion animals, dogs such as collies and sheepdogs have been bred for herding livestock; for hunting; for rodent control (such as terriers); as search and rescue dogs; as detection dogs (such as those trained to detect illicit drugs or chemical weapons); as homeguard dogs; as police dogs ("K-9"); as welfare-purpose dogs; as dogs who assist fishermen retrieve their nets; and as dogs that pull loads (such as sled dogs). In 1957, the dog Laika became one of the first animals to be launched into Earth orbit aboard the Soviets 's Sputnik 2; she provided evidence that mammals could survive in space, but died during the flight from overheating.

Various kinds of service dogs and assistance dogs, including guide dogs, hearing dogs, mobility assistance dogs, and psychiatric service dogs, assist individuals with disabilities. A study of 29 dogs found that 9 dogs owned by people with epilepsy were reported to exhibit attention-getting behavior to their handler 30 seconds to 45 minutes prior to an impending seizure; there was no significant correlation between the patients' demographics, health, or attitude towards their pets.
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