I only have 5 sheep so I use one like a syringe with a metal nozzle on and refill from the bottle for each sheep.
Numpty question here - I thought there was no need to worm in winter? I wormed mine about 6 weeks ago and thought that would be it till the Spring. I'm going to do another FEC sample though as I'm tearing my hair out with Mucky Bum. He is a 7 month old GFD wether and he has been runny since I got him in July. He's been vaccinated, up to date with flukicide and dosed for cocci. I don't understand it! He is in splendid condition (all 4 lambs slightly tubby tbh), growing well (nearly as big as his mum) and seems perfectly happy - eating well, no sign of bottle jaw, but he hasn't done a solid poo since I got him (other 4 are doing proper logs and marbles). Can't think what else it can be - do you just get the occasional runny sheep? It's OK in winter, but he did get a touch of flystrike in Summer despite daily checks, dagging and bum washing. Ho hum. Poo sample to vet tomorrow...