My Sebastopol gander hatched this year around feb/march (about 5 month old) has been off his feet for 2 days he can't even stand up his legs just go limp. I have recently wormed all my geese with flubenvet it said to worm them 7 consecutive days in a row but i stopped after about 3 days when i seen him off his feet incase it was the wormer that has caused this. He is very greedy and is first into the food so he could have had too much food with wormer in, any advice on how to help him/ treat him would be greatly appreciated.