Not sure if this was posted in this thread before. Might not be everyone's cup of tea but I've been following a very talented furry artist named h0rs3 for a long time and he's created a few amazing furry growth animations that have been steadily getting better and better over the past few years.
WARNING: furry, hyper, gay content
www.furaffinity.net/user/h0rs3
1.
http://www.furaffinity.net/view/1333943/
2.
http://www.furaffinity.net/view/1598335/
3.
http://www.furaffinity.net/view/1823243/
4.
http://www.furaffinity.net/view/18653032/
5.
http://www.furaffinity.net/view/24491587/
4 and 5 are his latest and absolute best so far