Former NFL quarterback Tim Tebow posted a heartbreaking video of himself saying goodbye to his beloved dog, Bronco, before putting him down Wednesday night.

In the clip, Tebow feeds his dog a piece of cheese and smiles, before breaking down.

“One of the toughest goodbyes,” he wrote in his Instagram status. “Wanted to make a special tribute to the sweetest boy ever - thank you for all the joy you brought and all the memories.”

Tebow has talked about his love of dogs before on several occasions and referred to Bronco as “his son” in at least one tweet. He told AOL.com in 2018 he got Bronco as a gift after he was drafted by the Denver Broncos in 2010.'

Read more at The TODAY Show.