I have gone to 4H shows where any clean bird could win and I recently went to a show where the competition was as tough as any open show. My comment: is he OK for a 4H show depends on what you want to get out of it. You have raised a bird you like and know. You are learning about Cochins. If winning is your only goal then I must say that over 60% of the birds I see in 4H shows are too young to do well. they just need more time to mature. If winning is the #1 priority then buy a good bird from a breeder who shows and wins. Condition is also a factor. You will not be embarrassed with the bird you have. More questions you can PM me at any time.He is about 5 months old. He has a good bit of growth left in him. Do you think he will be ok for a 4-H show?
The only thing you can control in any show is what you bring. You find out on show day what others have done and then develop a plan for next year. Enjoy!!