Why a rooster turns on people
A rooster's whole purpose, as he understands it, is the flock: find food, watch for danger and repel rivals. A human who strides into the run several times a day reads, to him, like a very large rival who never backs down — and in the breeding season, with his drive to guard at its height, the challenge gets answered. The attacks usually start small: a sideways dance, raised hackles, a peck at a boot. If the person leaps back, the rooster learns his charge works; if someone kicks out or swipes at him, he learns the rivalry is real and worth escalating. Most 'aggressive' roosters have been educated, one reaction at a time, by the very people they now alarm.
What not to do: the stand-off trap
Every fight you have with a rooster teaches him that fighting is the relationship. Chasing him, squaring up to him or letting children wave sticks at him all confirm you as a competitor, and a rooster who loses today simply re-challenges tomorrow — it is his job description. Equally, running away shrieking turns an impressive display into a weapon he will use on every visitor. The goal is to be neither rival nor victim: a large, calm, uninteresting feature of his landscape who never competes for the hens and never rewards a charge with drama. That sounds simple and is genuinely hard, which is why it has to be agreed by everyone, not improvised per person.
Calm handling that resets the relationship
Move slowly and predictably in the run, talk as you go, and avoid looming over him or grabbing at the hens in front of him. Many keepers find that calmly picking the rooster up and carrying him tucked under one arm for a few minutes while they do the chores rewrites his assessment — he is handled, unhurt and set down without ceremony, and you are plainly not another chicken to be fought. Scatter treats for the flock as you enter so your arrival predicts food rather than confrontation, and let him 'find' treats for the hens near you, doing his provider's job with your help. Consistency is the whole method: weeks of boring calm achieve what no single confrontation can.
Keeping people safe, and knowing when to call it
Until the behaviour settles — and with some roosters it genuinely does not — manage the risk honestly. Children should not be in the run with a charging rooster: spurs delivered at a child's eye height are a serious hazard, and a confident adult's project bird is not a safe child's companion. Warn visitors, keep the gate routine sensible, and use a towel or net if you need to catch him for treatment. A rooster who still injures someone after months of consistent calm handling is not a training failure on your part; rehoming him to an experienced keeper, or keeping him in a bachelor setup away from daily traffic, are responsible endings. None of this works if one person undoes another's calm handling, so share the rooster's rules in KinsLe through Family Sharing and the whole household meets him the same unruffled way.