> I had to put a pet down once and I was crying like a baby so maybe not
I relate with much of your comment but this was something I actually considered writing before. The most drastic emotional response I've ever experienced was putting a pet down. I knew it was the right choice, planned it out, to be done at home in the back yard, his favorite place and final resting place, and even made time for one last outing to his favorite lake a little while before.
But with all the planning and forethought, it's like I started grieving before the event happened. So when it did happen, I just cried and cried. Like, sobbing on the floor for an hour type thing. Also, the fact he was mentally still 100% but his body was failing made it a wrenching decision that I was questioning even though I felt like it was the humane choice.
I was really in a funk for about a year after. The first couple months, I'd just randomly cry as some old memory would pop in my head. I was really close to this dog though, was like a child to me and it hit really hard. I got him in my early 20s, then later married but hadn't had kids yet. For some reason, the saddest thought in my head was "he'll never get to meet my kids". I've had 2 dogs since, that have been more like pets than children and I have real children too which changes the dynamic entirely.