"is he heading toward loosing toes/foot?" ...what should he be doing to keep his feet
He and/or you should be checking his feet thoroughly
every day for injuries, wounds, cracking between the toes, etc. With neuropathy comes the loss of sensation. A wound ignored leads to the infections that are the most frequent cause of lower limb loss.
More generally, keeping his numbers good slows the progression of damage to the small blood vessels in the extremities. This helps preserve the feet and is very important to wound healing.