6 month old- digestive enzymes and methyl B 12 shots

[Guest guest]

Following a month of constipation and stools with my 6 month old

(stools smelling akin to my 18 month old autistic son's stools), I

decided to do a trial of digestive enzymes and other supplements

including vitamin C, colostrum, cod liver, etc. I put them in his

bottles and number 2 baby food and he went from having painful stools

every couple days to 2 and 3 stools a day that were healthier looking

and smelling. 2 Questions. 1) what would be a reasonable protocol for

use of digestive enzymes with a 6 month old? and 2)would you ever do a

trial of methyl b 12 shots or oral applications on an infant of this

age? Thank you in advance for your help.