Thanks for the replies, I use Moxi 3 or 4 times a year, including at times in September. I have to say I've never seen frets.
I used to worm using various wormers,advertised in the pigeon mags and never saw any worms after worming. The first time I used Moxi, the worms in the droppings were ...

A question for the members.

With my birds spending a fair bit of time, (maybe too much time), poking around in the garden, I do like to treat them for worms from time to time. Because I had some later bred babies that are just flying now, the big ones are well into the moult.

I am of two ...