Here’s something all you dog lovers will enjoy. PBS produced a new documentary about assistance dogs called Through A Dog’s Eyes, which is based on the Jennifer Arnold book of the same title.

If the book and movie Marley & Me brought you to tears, then you will enjoy this touching documentary that follows the journey of service dogs and the people whose lives they change. The dogs are so adorable! See the trailer below.

The producers also enlisted the help of Neil Patrick Harris. The How I Met Your Mother actor is the narrator of the film, which will air on April 21, 8 p.m. ET. A dog owner himself, Neil told the Associated Press that he was moved “by the strong emotional connection between the service animals and those who rely on them.”

If you can’t view PBS on your local cable, you can download PBS flicks on iTunes or view it through other sources. Click here to find out how.

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