What is your advice for slow to mature colts? Did you do anything different with them to bring them along?

The horse in question is a Judys Lineage.

Two choices:

1. stick with him and wait in him (some won't ever get better).

2.  Find another prospect that wants to be a barrel horse . 

Yes!!!!!!!!!!! I have held on to late maturing colts a d when it was over , wish I had cut them loose a lot sooner. The ones who really want to make , they will. The others would be happier doing something else. 

I have one that was a late bloomer. She is an AQHA World Champion. She really came on as a 5 year old. I have a trainer who can size them up well. 

I recently went through a very similar situation. I had a mare that had so much potential but was extremely fractious. I made the decision to breed her when she was 5 and give her a year off to mature. I am so happy that I did because she has came back so much better and focused. I have only ran her a few times but she has already won some races. It is definietly a gamble to try and wait it out. For me, it came down to the fact I felt that she had the athletic ability to be a winner. However, it all comes down to your goals and how long your willing to wait. Maybe setting a timeline would be a good idea?

I wish you the best of luck!

Thank you! I guess I should've put more info- the horse was started January 2020 with 60 days, turned out and has had 60 more days November/ December. I guess i can't compare him to horses who were started at 2 or 3

I think you are asking too much from a young horse, like most of us. Patience is a must. A lot of horses will not mature physically and mentally until they are 6 years old.