Why are you splitting hairs (hah)? They are working on growing hair on pigs, it doesn't matter which part of the process they are on. It's all pre-clinical research until they deem it to be completed and get approval to move to humans.Probably not
@Edit: Sorry, it is not from letter.
"...Currently, Stemson’s research and development efforts are focused on developing an optimized solution for human skin structure environment in larger animal models..." (https://www.businesswire.com/news/h...ecures-15M-Series-A-Funding-to-Cure-Hair-Loss)
So, they are developing. It does not imply in testing, I think