Typically, I only put up puppies in a litter of all males for reserve, but if I don't need another dog in my kennel you might be in luck.
No sales right now, but as I progress through the game there might be. Most of those sales will be bred males
Second generation will be named after sea creatures such as Turtle, Seal, Squid, and Anemone.Current generation (1st) females will have their first litter at age 96 or 98 and will be locked and put up for sale immediately after so their next owner can still get a breeding out of them.