I have a speculative evolution project regarding giraffes. For those unfamiliar, giraffes are ruminants and rumination is not viable for carnivory according to every site I have wandered upon in my research. Ignoring any of the other issues of giraffes evolving to become carnivorous, my question here is how rumination could be adapted to a carnivorous diet.
There are no animals in our world that are ruminating carnivores and from my research, it simply isn't necessary. To me, it seems like there would be a firm pressure to remain an herbivore rather than make the leap to carnivory.
Now for some small but important details. The only animals besides giraffes in this project are paper wasps, the particular species of which prefers nectar and would be unlikely to decide it is a good idea to predate giraffes. The ecosystem is a series of islands, so contact with meat would be frequent through dead giraffes. I would like any answers to apply to scavengers and active hunters, if there are any differences between the two. And finally, while some handwavium is allowed as I do not need the exact chemical composition of their stomach acid, I want to be able to stick as close to realism as I can.
So, would rumination disable the path of carnivory in evolution?