Koi in low temp POND?

[JOSH]

We just purchased three 6" Koi and Im a little concerned about adding them to our pond which currently holds no fish.

My concern is the pond water is 10 C. and the fish came from a heated tank and the LFS. I took a 30 gallon tank and added water from the pond and heated it up to room temp and then floated the fish for an hour and kept them in the tank over night. The next morning I let the temp in the tank drop down to about 15 C. Then I caught all the fish put them in the bucket and floated the bucket in the pond until the temp in the bucket matched that of pond. Then I turned the bucket on its side and so the fish could swim out as they please although they have remained in the bucket.

I know its a little late now but those of with Koi is the water temp to cold?
The LFS said they would be fine

Since buying the fish none of them have been interested in food is this normal. They ate well at the store?

Just some feedback would be great