Hi there, hope you are enjoying BYC!
How old is he?
Is this in addition to the starter... or what you are calling the starter? And by starter... I presume you mean chick starter not turkey starter which is 28-30% protein...
Not really limiting things at my place... but I found when I bring out snack or feed the birds fill up MORE than they did when it was constantly available and they went when they wanted to. It's like their more excited for it.
I agree if you wanna know how "fat" your tom is then you NEED to weigh him.... He looks FINE to me. How high is his roost? Maybe add some extra hay to soften the landing.
Diet... free range birds are more active AND more lean in my experience. Maybe free range longer or completely??
Not free range and limiting feed *might* lead to malnutrition instead of dieting.
Meal worms are another FATTENING treat.
They look beautiful to me.