Need to know ASAP! introduucing my little ones into my flock??

[Sweet Honey]

What is the best way to introduce my 2 little chicks into my flock... I got little ones... when VERY tiny at end of April.. Can you do the math?? ... They were very little, were on heat lamp.. tiny tiny then for a good while seems like... They are sexed and the 2 of them... Looking pretty big.. haha... When I have put them in yard in a open baby playpen ,, Then have let my 2 hens out in yard to check them out... Well last week I held one of the little ones in front of my Honey RIR and she went right at my hand to peck mean"" to the the new little one... .. What is best way .. and what is best age ??? I really need to know ASAP??? because the little ones are getting a bit bigger now ... There safe"" chicken box// cage Seems to be to small for them to just be in all day with just the 2 of them.. Want to put in with my 2 adult hens ASAP !!! So will have more room and to get this party started ! ..????? Would love to do it today !! So help me if ya can on this matter.. ASAP...

. THX

 

[ChickenCanoe]

Best is like numbers and like sizes.
Then introduce while foraging.
Then combine at night by placing on the roost and make sure you open the coop at dawn the next couple days.

RIRs are very territorial with birds they haven't grown up with.