Below is from the sled dog/Greta thread:
"Quote Originally Posted by farmerted7 View Post
I think you should leave it like that and then later on (goal 9 maybe) you will store grown Greta and be able to place the second one from the forge. That's what I'm gathering from the post from FedererGoat. Similar to Harvey the mink.
I'm not there yet myself. if you still have your 2nd pup in forge, just leave it there til you CAN place it. Don't sell it for 0.
Yes, goal nine is where you can finally place the second Greta.
You put the first Greta in storage and then go to the forge to ‘Warm Greta Up"
You can then place and raise the second one while the first one is crafting in the forge."