In the time we've had Daz we've given him two worming tablets.  The vet prescribed Drontal.  The first time we did it we didn't know Daz that well and he was not particularly settled anyway so the changes we noticed in him were not certain to be due to the wormer but last week I saw the same things again and feel more sure that the Drontal is disagreeing with him in some way.

It's not that his poo changes particulary, very little really.  It's that he acts depressed, goes off his food, stops wagging his tail when we go near him, is more likely to sleep separately from us rather than always lying at our feet for watching TV and stuff.  He does still pull himself together and enjoy some of his walks and runs but he's less likely to run, and he tends to trudge along behind us on walks more often.  So it's not ALL the time but there's just a general impression of a week to ten days of him acting very under the weather after worming.

It's precautionary worming anyway, it's not like we ever saw worms. 

Anyone got any experiences with worming their hounds, recommendations at all?

By the way, he wasn't upset by the actual administration of the tablet.  Peter just gave him small strips of chomp and then slipped a tablet in then followed up with a chomp and he never even seemed to suspect anything different had just happened.