
I presume it is a Champ show you are entering ?
You do not as yet need to enter your dogs KC number at breed shows the ATC number is for dogs from abroad only
Your dogs details are entered as follows
1st box dogs name exactly as reg at the KC
2nd box the breed
3rd box the sex D for dog B for bitch
4th box full dob day/month/year
5th box breeder if you bred the dog it is Exh if not then the breeder(s)as reg at KC
6th box fathers name from the KC cert
7th box mothers name from KC cert
8th box the number of the class to be entered in(I always add the class eg MPD(Minor Puppy Dog)
If in the schedule Challenge Certificates are offered then you pay the CC breed rate if they are not then the non CC breed rate is due
Most people enter in the lowest age class so for your boy this would be Minor Puppy then he will only be against dogs upto 9 months of age
Hope this helps