Crumbly poo

As the title might suggest, my nearly 12 month old has crumbly poos. Dr google says constipation, but the thing is- it's soft and crumbly. Not hard. This has happened since switching to cows milk as per drs advice.

Any ideas??? He's not straining, or uncomfortable, but these poos are SO stinky, and the crumbliness has me worried.

TIA

Sophie has kinda similar ones crumbly or lots of little balls of poop. I try make sure she has enough water and juice. Prunes? Weetbix in the morning? that kinda stuff sometimes helps

I thought of giving the usual stuff for constipation, only he's not constipated. It's so confusing! He's pooing frequently, multiple times a day... but most of them are this weird crumbly stuff. I thought it had to be hard to be constipation??

.................... Bugger!

Get some probiotic into him. That always sorts out weird poos here.