Like I said above, I tried really hard not to let myself thing "wtf" about anything because I wanted to be open to any and all pet death rituals. My feeling very strongly is that everyone needs to do what is right for them and as long as they're not hurting themselves or anyone else, it's an okay way to grieve. But some of the more unusual ones for sure besides cloning (see my other reply for more on that) were probably the taxidermy/preservation options, like preserving a pet's ear or tail so you can still pet their fur when you miss them, or having the whole skeleton preserved and reassembled. One woman I interviewed had her Boston Terrier taxidermied in full and keeps in him a glass case like a side table next to her couch.

In terms of things evolving over time, I noticed that in even just the past five years people seem much more open about talking about their feelings about their pets dying and sharing their emotions. I think social media has helped with that a lot -- it's pretty common now for people to be open about posting about being sad about their pet dying and using Twitter/Insta/FB/etc. as a way to connect with other pet people who understand that loss or people who also knew and loved their pet. I also think similarly as we become more open talking about our feelings about pets dying we then also normalize having traditions/rituals around those pets' deaths. A lot more people now I think are down to have a memorial service or viewing hours for their pet, when I feel like even 10-15 years ago people may have WANTED to do that but felt weird about it.