Don't feed Raw, but I only do mine if/when they have worms...which has been never!

I think a lot of people think the worming tabs last for 3 months, (which is how often manafacturers recommend) and I have to explain to a lot of people they only work whilst in the blood stream, like any tablets!

I don`t worm my dogs routinely. None of them scavenge or hunt and we`re not in a rural area.
The flea treatment treats worms so they get done occasionally anyway. I haven`t had a dog with tapeworm for 30 years.
I think if you pick the poo most sorts of worms are easy to spot.

I do feed raw and I worm routinely every 6 months using drontal.