D.B.
Welcome to Mamapedia. We have a number of men on this site, and they are more than welcome. Please ignore the harsh comment by the person reprimanding you for joining this. We have tons of questions on this site that don't relate to parenting, including pets, vacation, car purchases, and much more. You are more than welcome to request support and I hope most of the responses are kind and helpful.
I'm so sorry for your loss. We had a dog for almost 14 years and we know well the pain of losing a dear old friend. Ours died of cancer in our arms, and she was ready to go. We didn't have to make that very painful decision to have her euthanized. I think your situation is more complicated because there was an accident and you weren't there, so you feel guilty. I'm not going to tell you how to feel, but I will remind you that we all have accidents and risks, and tragedies happen.
I am so very sure that your dog loved you and knew that he was loved by you. I'm sure that he had stayed in the house many times when you were working, and I trust that he felt safe and secure there. I think dogs who have to go into trauma hospitals at the end of their lives suffer as well - maybe they are not entirely alone, but they are in unfamiliar surroundings which causes a lot of stress.
As with any death, it's harder on the survivors. So you are left coming home to your quiet house without your longtime companion to pant, wiggle and wag a tail.
You are doing the right thing, to grieve and feel the pain. You are right not to think about adopting yet. It's too soon, your feelings are too raw.
Here's what we did - maybe some of it will help you. We read "The Rainbow Bridge" which our vet sent to us. We notified a few families in the neighborhood whose children were attached to our dog, to let the parents explain to the kids in their own way. A group email seemed easier than one-by-one or being asked individually by neighbors where the dog was. We boxed up her belongings (toys, dish, leash) etc. and put them in a closet, which was easier at the time than deciding to donate them to a shelter or constantly facing them. Ultimately, we did donate a number of things that were usable by lonely and displaced dogs - that felt good. We buried our dog at the edge of our woods, and we made a grave marker with a simple "garden stepping stone" kit from the craft store. We used a combination of the stained glass shards and marbles that came with it, and some written words using the alphabet stamps we purchased separately. It helped. (In contrast, neighbors buried their dog's ashes and a couple of toys, and used a similar marker over that. Another set of neighbors planted a tree in their dog's memory.)
How long the grief lasts varies from person to person. Take whatever time you need. Don't let anyone tell you to get over it or that "it's just a dog." There's no timetable on grief - remember that.
It took us more than a year to get another dog - my husband still wasn't ready, but I saw a local newspaper's series on adoptable dogs from a local, well-rated shelter. Most weren't appropriate for us because I was looking for a non-shedding dog. But one day, a dog's profile popped out at me - it was a mix that included the breed of our former dog. When the same profile was there the following week, I knew it was time for me to go look. My husband came around after the dog was in our home for a few days - once she jumped up on the couch and put her head on his knee. She was a 1.5 year old rescue and we couldn't be happier. I think we gave her even more than she gives us - if that's possible.
Take the next few months - at least - to evaluate your lifestyle and what you want from a dog. You have a lot of love to give, but it takes a special dog to stay home all day while someone's at work. That's hard with a puppy, and it's hard with a rescue who may have been abandoned once already. (Ours had been abandoned twice - but we work at home and she's rarely alone.) So you might want to evaluate a dog sitter or a doggie day care option. But not now. It's too soon. Somewhere, somehow, a dog will come into your life at the right time.
If you continue to feel guilt, please seek some short term counseling to help heal. Don't feel silly about this - it's a very real feeling and you are entitled to support.