our fish pond

we have lots of baby fish now we discovered them in mid summer so I hope they cme through the winter
Its as bad as having children
Richard and I cluck over them evey day feed them and count them!!
We are having to slow on the feeding now so we will have to wait and seen how many we have left after the winter
we ahve approx 30 babies as we enter the winter
Has any one any advise on how they keep their baby fish over winter?