Being from Cackle Hatchery is what's causing your bantams to be so large. Feed may make some minor difference in final size [usually poor feeding makes smaller birds] but genetics determines size. I've seen several bantams from Cackle & other hatcheries. All were much too large. Actually the...
They like to sleep once in awhile too you know. Give them time for a normal sleep cycle & they may perform better. That said, Sebrights generally aren't great layers & if they're older hens they may not produce much at all.
Another term that's new to me. What's a "polled phoenix"? I know that a Polled Herford is a bovine animal without horns but I suspect it may not mean the same thing in Phoenix.
If you want quality Sebrights Ideal isn't the place to go. I've seen their Sebrights at several County Fairs I judge in the summer & they've all been at least twice as big as they should be. Size hasn't been their only flaw either.
Frankly, you won't get good Sebrights from any hatchery I know...
People acn't cheat you if you do your homework. How many times here on BYC have you seen a post where someone is shocked to learn that the "SHOW QUALITY" whatever they bought is really junk. I've said it before & I'll say it again. If you want to get into breeding/showing quality poultry trhe...
I see at least one single comb so not really a Sebright. Also coughing & sneezing isn't a symptom of Coccidiosis & it would be unusual for adult birds to acquire Cocci.