I'm thinking they're some variety of sex-link. I don't know the breeds in panama, but I think all the black and white barred birds in the first pic are roosters, and all the brown birds in the second pic are hens. I think the center hen in the second pic is laying or close. A better pic of just her would help, but I don't think that's a cockeral.
Okay, looking again, those may be saddle feathers, as stated a nice profile shot of the bird in question would help.
By the body type, they look like general dual purpose birds. Hens will lay nicely, roos will be good for eating but not huge like an american supermarket bird.