Former hubby Nick Lachey is also super upset about the death of their beloved dog to a vicious coyote.

In a new interview with Access Hollywood, Lachey said,

"I think a lot of people forget that Daisy was my dog too -- for years."

He revealed that while he hasn't spoken with his ex-wife and Newlyweds co-star, he's been thinking about her and wondering how she's holding up.

"I didn't reach out to her. I'm sure she was upset... I was upset... It was sad to hear that happened, but it's part of the cycle of life."

Not even a phone call? Hmm...

If you haven't seen our tribute to Daisy, check out our gallery!