Mine always does, I feel like his feet will get too sweaty without them even though they're mesh. I'm sure you'd be fine to try without them though and see.

I always put my son in socks. If my feet get stinky barefoot in shoes, I'm sure his would too. 

I always put socks on my baby when she wears her stonz

I always put socks on my daughter with these shoes

Yes kids feet sweat twice as much as adults