silkie rooster and hen acting funny - mating?

[Kizzah]

Hi guys so I came down to check on the chickens and noticed my rooster and a hen acting funny. They are guarding a corner of the run - or so it seems to me. The roo is a juvenile, and the hen hasn’t layed before, though she is due to start judging by her age. Both are around 6 months.
The rooster is standing tall, beak open and wings held out a little to make himself look bigger. He hasn’t crowed yet, but managed a strange half-crow a couple of times. He normally runs to me for a hug, but no cuddles today. Attached a pic to see. Other chooks seem unusually noisy, but not sure if I’m imagining that. No predators about - I checked.
Is this mating behaviour??

 

[chicknmania]

No, I don't think so. They might be sick. Are they eating, drinking? How long have they stayed in their corner? Do you notice anything odd...any labored breathing, discharge, diarrhea? Are they walking normally?

 

[Kizzah]

Hi they are acting normal otherwise. They came out just before and he was following her around

 

[Kizzah]

Just gave them some greens to make sure apppetite is completely normal and it is

 

[Kenny_]

Just wanted to say you have some pretty chickens!

 

[Brahma Chicken5000]

Just wanted to say you have some pretty chickens!

X2

 

[Kizzah]

Aw thanks! My husband thinks I have too many, but I keep finding pretty ones! I have 9 - a lavender Sussex, 4 silkies, blue australorp, barnevelder, silkie x (not sure what with but she is black and has a Pom Pom head but flat feathers) and a Plymouth Rock.

 

[Kenny_]

I completely understand. You just cannot say no to a gorgeous chicken, or at least I can't. Barnevelder, silkie, blue laced red wyandotte, etc they are all so beautiful and it's like yes, yes, yes I do want you, too! Thank you! lol Please come in to my life! hahaha! Back to the subject matter: I do hope your birds are coming of age, if that's what you want them to be.