Your bird is a Faverolles then! I have 2, they go broody at LEAST twice a year but I have no rooster and break them. I also have a BIG Black Australorp (Zorra) that goes broody.
My 2012 chicks were my first and raised themselves. I ordered the 2015 girls when Zorra was broody in May. I stuffed them under her the second night after they arrived, she had been broody for about 2.5 weeks, normal incubation is 21 days. She did a GREAT job of raising them. One of the Faverolles was broody at the same time. I broke her when Zorra took the chicks but the Faverolles turned into a "mother's helper" and the 2 of them were with the chicks for 2 months. Zorra kicked them to the curb then but Anais stayed with them for another few weeks.
One of the Faverolles was broody last year in April, I had already ordered chicks for that timeframe based on the historic broody times of the three 2012 girls. But she insisted on returning to, and hogging, one of the nest boxes. She would NOT stay in the brooder area where I had made her a nest with 4 plastic eggs to sit. I didn't want her to try to raise chicks 2' off the ground. How would I feed and water them?? I broke her and raised the 7 chicks with a Mama Heating Pad
(https://www.backyardchickens.com/th...d-in-the-brooder-picture-heavy-update.956958/) cave. Zorra went broody about the time they arrived but she wasn't interested in dealing with chicks. I guess they need that period of being broody for incubation first. I broke her as well but when the chicks were 3 weeks old she decided she wanted to raise them. Again she spent 2 months with the chicks showing them the best daytime hangouts and all sorts of things chickens consider food.
I NEED to see what's going on! 
Feed store chicks make for less dealing with cockerel antics. And I don't like my broody's to sit that long if I can help it. I personally won't let ANY broody under 1 year old sit. Their bodies and minds are still growing and maturing and there is a HUGE difference between a mature hen and a pullet. Since I'm in it for the long haul, the pullets will go broody again... for now they break. 
And I only use a wire bottom kennel for night time purposes, otherwise an open bottom grass pen is just as effective at breaking a determined broody and the only thing that matters is they don't gain access to a comfy nest.
Maybe not convenient.. But fantastic, happy medium... for some people. 
And then getting it to grow with them is just too much for my over thinking mind... you have no idea how many frames and different brooder type/sizes I have experimented with. So in the end, keeping it simple where I can simply wipe off the dirt that settles and raise or lower. Oh and then there's the whole how many heating pad changes to accommodate the never ending barrage of new hatchlings weekly, the lamp SEEMS like it supports a wider range of needs and I can see nobody is being trampled and whether they are sprawled nicely or standing chilly and how much poo is accumulating or how dry the shaving are.. I like to see the interactions. So it's mostly a control thing. 
I love Backyard chickens! Where else can you find civilized discussions about raining chickens!
But I bet they'd be warm! 
I can't afford to sustain continued heavy loss. That's the 3 rd one on under 2 weeks. 
The (identity with held for legal reasons) has been brazen within 15 feet of my kitchen window. I'm now the proud owner of a pellet rifle that will be contained within my property when fired and effective against said sized target! 
On the other hand... my last broody that lost her only baby (one of these recent 3) was back to laying within 1 or 2 days... and of course will be broody again like clockwork. 
(oh ya, had my first disease too, Marek's). Have to edit last year I did see one loss also, still 7 years!
