Sean and Catherine Lowe are mourning the loss of a very important family member. On Feb. 24, Sean posted a farewell to his dog Ellie, "the best dog in the world," as he wrote on Instagram. Get push notifications with news, features and more. + Follow Following "Saying goodbye to a dog is just the worst," the former Bachelor star, 37, captioned a series of photos reflecting on Ellie's puppy days through her more recent years. "Before Catherine, before my kids, before all the Bachelor stuff, there was Ellie." Taking a more light-hearted turn, he added, "My kids will never measure up to her greatness and I will let them know that daily. Now please enjoy this depressing carousel of pictures."