Clumsy is part of being a gosling and they can look like they have big knees and nothing be wrong but to play it safe why not supplement with some Brewers yeast on their food. and can you post a pic of them and let the experts on here[I'm not included in that group] take a look.I have noticed the same thing happening with my 2 goslings. Their knees look really big and they are really clumsy! I thought maybe something was wrong too.