POL means point of lay, so if you've had them for a year, they ain't POL any more.
Sassos are hybrids, I think - that's a cross between two pure breeds - so if you cross a Sasso male and a Sasso female, you won't get a Sasso chick. You'll get some sort of mongrel - doesn't mean it won't make good eating, but hybrids don't breed true.
However, if you can get Sasso eggs to hatch or Sasso day-olds, rearing them for the table is relatively simple. Keep them under a lamp for a few weeks until they get feathers, keep them clean, give them water, feed them chick crumbs to about six weeks then change to grower / finisher pellets until they are 12 weeks old and then kill, pluck and dress them, stick them in the freezer. Job done.
We have Hubbards, bought as day-olds, now three weeks. Just off heat and going into a pen in the veggie garden tomorrow. The run has a roof as they would still be easy meals for cats, gulls, crows but they can exercise, peck grass, sunbathe and dust bathe (they already are but the grass is trashed now where they are).
Warning - once you have done this you will be spoiled for supermarket chicken forever. If we don't have our own, we don't eat chicken. End of story.