It's up to you if you want to see what kind of a stud he will be keep him as is, if you need geldings geld him if he dose not produce well and use him as a show horse.
I'm not consistently getting game mail for store item alerts. Sometimes I do, but many times after it seems like a lot of time has gone by with no alert I'll start checking the store and the item I'm looking for will pop up & no mail is sent