Ninja is a mixed breed cockerel.
Henrietta is an Easter Egger pullet.
Rex is a mixed breed cock, probably with influences of Wyandotte, maybe Orpington too.
Mabel is an Easter Egger cockerel.
Ohanna is a Buff Orpington pullet.
I would recommend purchasing some antibiotic ocular ointment for Mabel. Be sure to watch all of your other other birds as well as him carefully for any signs of sneezing, coughing, rattling, gurgling, and nasal discharge, as swollen eyes can sometimes be an indicator of a contagious respiratory disease. You should also do a full physical exam of the entire leg, from hip to toes. Do an exam of the other leg first to get an idea of what a normal leg should feel like. Move the leg and feel how the joints move as you do so. Pinch the toe as well - hold him in your hand with his legs hanging down, and pinch the toe of the afflicted foot. Then pinch the other one. See how his reactions differ, and how much he can move the leg. To help rule out Marek's, check his neck for "Pancake Tumors". They will be small, fatty, pancake-shaped lumps just under the skin along the back of his lower neck, on the spine. They don't show up in all Marek's infected birds, maybe only 50%, but they are one of the common things that will slip past vaccines, and can be useful indicators.
EDIT: And Daisy and Minnie are both pullets as well.