The 55-year-old singer was photographed walking the Pomeranian he used to share with Gwen named Chewy all by himself at a park in Los Angeles on Thursday.

Wearing his favorite cargo pants, Rossdale slipped into a white t-shirt and left his curly hair undone.

Clutching his cell phone in one hand, Stefani's ex-husband looked intense while having a conversation with someone on FaceTime during his afternoon stroll.

At one point, the Bush frontman plopped down on a grassy knoll to stretch out all this tension while letting his tiny dog run free.

Rossdale's solo walk comes on the heels of rumors that he's already having issues with Shelton.

Stefani married the country singer in an intimate ceremony at Shelton's Oklahoma ranch on July 3.

Rossdale -- who shares three sons with Stefani -- and Shelton are reportedly clashing over co-parenting.

The former married couple are parents to Kingston, 15, Zum