My male Dogue has what I think is a worm at his back end. Not sure what species, but its small and white opaque size of rice grain. It moves like a leach going long, thin.and flat then back to rice size. This is the 3rd one I have seen he was wormed 6 weeks ago. But he eats dead things when.were out. Fresh dead but still wild dead. What do you think it is? I have a pic but not sure how to show you

Most likely tapeworm if he eats dead animals outdoors.

Sounds liek tapeworm, check that yoru wormer covers this and if not get oen that does, either way worm him fior tapeworm..

I agree, tapeworm

Thankyou all, he was wormed with panacur not sure if this does tapeworm I've thrown the pack out. I'll have a look on hyperdrug see what covers all worms. He has lacked condition lately and acts like he's never fed. Hopefully a good dose will clear him out and ilk keep an eye on his poo when picking it up. Never come across tapeworm before. But he's had a few hares and rabbits so probably swallowed few fleas. Will skin em next time

No Panacur does not cover the most usual tapeworm (does do some species).  If he has gone down in condition hook worm is also a possibility, though for course tapeworm will bring condition down too.

Grains of rice near the bum are a classic sign of tapeworm.

Panacur only deals with one kind of tapeworm, it doesn't cover the other kind.  You need to use either:  Milbemax (prescription only), Drontal + or Plerion to be sure of covering both kinds of tapeworm.  (To name a few off the top of my head.)

It is good to vary your wormer and not always to use the same one - for reasons like this.  I use Milbemax, Drontal +, Panacur and Plerion in random rotation every 3 months.  If your dog routinely eats dead animals or poo, then maybe worm every 2 months.

Tapeworms are zoonotic (can be transmitted to people), so wouldn't leave this to chance and would worm again in a few days with one of the above.