https://www.furaffinity.net/view/46446531/
It's a welcome change to have a macro furry story that has slow growth and a protagonist who isn't a sociopath. This is a backstory for the author's OC, an anthro cow named Callie "Pea Seed" Patches, showing how she went from just under five feet to more than thirty feet in height, and how her life changed. I also like that it explores a setting where a portion of the population just becomes giant sometimes and how society would deal with that.