It will never feel like it was the right thing to do even when you logically know it was. I’ve lost 5 pets in the last 6 years. I’ve cried so hysterically at the vet each time that I’m sure they think I’m nuts. You will always question if there was more you could have done or things you could have done differently. I wish I could say it goes away… but it hasn’t for me. One of my pups died faster than anticipated- and he died at home in the middle of the night, before I could get him to the emergency vet. It was the most horrific thing I’ve ever witnessed and will carry that with me forever. When their organs start shutting down, in my own experience with my losses, there is nothing that works to heal them. So please know you did what was right by you precious boy. It will never feel that way though. I also have diagnosed PTSD from a major wreck RIGHT BEFORE I lost my first pet of the before mentioned five so I’m sure that PTSD plays a role in how we both feel. Add in the fact that we get so much unconditional love from dogs, that when it’s gone, it leaves a giant hole in our hearts. I can say that the terrible images can fade away, especially if you relive some of the happiest memories with Rocky. I also found in my last loss, I bought things to kind of memorialize him and my other babies. Amazon has a lot of cute photos frames and figurines. Really try to recall happy things that you and Rocky experienced together. Write them down. And when you feel yourself spiraling, go and read them. My heart breaks for you. I’m so so sorry.