S.H.
OMG... sorry, but your Daycare is off base.
He is ONLY a 9 month old.
Babies and 1 and 2 year olds... do NOT "play" with others interactively NOR "socialize".... they "parallel play." Look it up online.
Tell your Daycare this.
Geez.
They are making you worried for nothing.
And... what EXACTLY do they mean that he is "trouble"?????
They better darn well ITEMIZE it and everything and explain WHY.
They can't just be capricious about it.
They should know about baby/child development.
And your baby has been with all loving adults as a baby, no biggie. He will adapt.
all the best,
Susan