Can I use cydectin oral drench

[Fowler]

On pregnant ewes a week and half before lambing?

[J.T.M.]

Ewes
Treat at or around lambing to minimise the "spring rise", and pre-tupping, when rams should be treated also.
After treatment, CYDECTIN 0.1% Oral Drench for Sheep continues to kill stomach worms picked up by the ewe for 5 weeks, thus substantially reducing pasture contamination. This "vacuum-cleaning" effect greatly reduces the worm challenge to lambs grazing the same pasture
http://www.noahcompendium.co.uk/Pfiz...ep/-45312.html