How to comfort my aunt's dog after my aunt passed away?
I (16M) lived with my aunt (35F) until she was unexpectedly hospitalized about a month ago. She spent 6 days on life support in the ICU and eventually passed away.
Her dog, Kratos, who's likely a Great Pyrenees-Golden Retriever mix and ~9 years old was a rescue from an abusive home, so he already has pretty intense anxiety. She had him for 5 years and he was pretty much velcroed to her until my aunt passed away.
Since her passing, he's been pacing around the house to look for her. He's eating less, and even more hesitant to go outside. I don't think he understands that she passed away, and I don't know how to comfort him.
I've been incentivizing him to go outside with cheese. I've also been checking on him and spending more time with him. I've been petting him and verbally reassuring him, but he still has these behaviors.
Everyone else I live with, my aunt's husband (36M) and my grandma (60F), have been doing the same things I've been trying. Kratos' anxiety is a little better when my uncle in law is around, but he works full time and so does my grandma.
This leaves me the only one to help him most of the time since I'm on summer break and only working part time. It's also really upsetting that I haven't been good enough at comforting him for any of these behaviors to improve. I feel like I should be doing better to comfort him. I don't know how to fix this and I feel so frustrated and so powerless.
I would love to hear any advice to help my aunt's dog.