Here's Boomer
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Here's Boomer was an hour-long television movie and short-lived TV series (24 episodes) aired on the American network NBC in the early 1980s. Boomer was very similar to another acting dog named "Higgins" – known as Benji in movies. Boomer was bigger and not as athletic as Benji, but was still widely loved. In real life, both Boomer and Benji were abandoned or lost mutts whose performing talent was noticed by animal lovers and trainers. On screen both played the parts of stray dogs that were smart, friendly, and loving of their human and animal friends.
Boomer once appeared on Late Night with David Letterman, and had a stunt dog that stood in for him on some of his more difficult tricks.