Ask your pediatrician to do an A1c blood test on him, which is a 2-3 month blood glucose average . Then if that comes back high ask for the glucose tolerance test. The A1c is a much better diagnosis than a here and there blood fasting finger stick.

Make an appointment with a pediatric endocrinologist.
You’re right. Something just isn’t right here.

My daughter was dxed at age 2.She is now 17 and doing fine.
Good luck

I think he should be under blood sugar control.
But I tell you what happened with my son when he also was two years old.
He woke up in the morning and I felt that ketone smell. as I was worried, I took him to the doctor. He told me that it happens at that age, when there is a disbalance of fat and glucose quantities.
Fat need glucose to be digested, and glucose need fat too. If one of the two is missing or exceeds the other, you may have such disbalance with children. This disbalance creates the ketones in his body, that create the specific smell.
Also nowadays we keep drinking and having Fructose more than glucose, and fructose is more difficult to digest as it is prepared from Corn starch, and is 10 times stonger and sweeter than glucose.
That was many years ago, I never had that problem again.
I remember having given a lot of natural juices to him, and a lot of peeled apples, to avoid the pesticides on them.

yes it is possible and if it runs in the family a simple skin ***** with a glucose monitor should help.
when my son was diagnosised the first sign was amount of fluid intake, frequent string urine and sweating.

im really sorry about the situation you are in but mabey you should ask your doctor if it is a big concern