Very pretty flock.
Your feed routine sounds spot on and I think her size is genetic difference not obesity.. possibly couple with discomfort from the toe adding maybe a few ounces to her over all weight.
Having harvested my share of chickens.. some had huge fat plugs in their abdomen but didn't show an ounce of fat or vary in size from others who didn't have it of the same age and breed.. which excess fat could eventually encroach on internal organs including the reproductive system, heart, lungs, etc. and display as heavy breathing, reduced egg production which can be hard to detect, and probably other symptoms. But I truly DON'T think I've heard anything resembling obesity due to excess feed consumption.
And certainly it's entirely possible for A bird to have an eating disorder of sorts.. but that is often displayed heavily with quirky behaviors and fairly identifiable as not quite normal. Which your little bent toe gal sounds pretty normal. I would probably want to make sure she got SOME treats especially since she will have a harder time foraging bugs and competing than the others. Treats aren't completely evil.. kept below 10% of total daily intake so as to not disrupt good nutrition.. they are fantastic enrichment!
Listen, I wouldn't change a thing. I would make sure there is something nearby for wiping and honing beaks.. and since she can't scratch her normal amount.. it would be totally worth making sure her toe nails (and beak) are trimmed or filed IF needed.. to help her stay comfortable.
When you're inspecting her, get a good photo of the foot and toes if you can.. make sure the bottom part she walks on still has good skin on it and all that.. just keep a little extra eye on her. I missed if she perches on a roost or what the bedtime routine is.. but roost type might impact long term comfort level.. which I suspect from your description they are being kept as mostly pets and comfortable and healthy are the goal, is why I mention it.. following up.. you should consider in YOUR mind, since chickens are prey animals and will do everything they can to hide any discomfort, making it challenging for us to determine their pain level.. we turn to quality of life.. still doing chicken things, eating, drinking, foraging, staying with the flock.. or withdrawn, not much appetite, no interest in special snacks, staring at the corner, etc.. At some point or what point might YOU consider euthanasia , a kind but very difficult choice.. to be the right one, and do you have help or plan for if or when you face that? I only ask because sometimes dying is an ugly inevitable process making natural no so desirable. Sorry for mentioning it, but I'm sure you ARE looking out for her best interest!
Speaking of which.. yes, get her weight. Write it down with dates and keep track (weekly, monthly, whatever YOU can swing) so you can see any trend or sudden change.. but please do NOT obsess about the number, every chicken is an individual regardless of what the charts say.
But I did confirm Australia recognizes both bantam and standard sizes with a link following and noting that it doesn't matter what the standard says what matters is what people select for and reproduce but feeding a bird less will not make it a smaller bird. I WISH they would separate the two bantam/standard in the US.. I see such HUGE size discrepancy... I selected for tiny when possible.. because that WAS the point of Silkies to ME. FWIW though.. the Silkies I did put on my table were very meaty more on par with little dual purpose carcasses than little leghorn layer type carcasses.. My bantam Ameraucana.. were more the layer style body type than any of my Silkie ever were.. Then again, maybe none of the tiny tiny ones made it to freezer camp.. that line was more rare variety.. so boys sold well. I think my point has more than been expressed though!
Check it out..
https://silkieclubofaustralia.webs....t and fluffy at,ragged and “ osprey plumaged”.
