[CornishFarmer]

.

[Fronhaul]

We have just tried Zermasect as an alternative.  We found it excellent.  Crovect has an 8 day withdrawal period and Zermasect a 28 day withdrawal.  Table 4 at the link below gives some more detail of your options:
http://www.vmd.defra.gov.uk/pdf/ectoparasiticide.pdf

[Pasture Farm]

Last time i had a sheep go down bad with strike i sheared really hard as short as the old clippers would go, its amazing how many maggots the clippers will take, then a LARGE tripple dose of Spot on (only thing i had) rubbed into the area and pulled out as many as i could, next morning not a maggot insight the Ewe was a bit fragile for a while but she fully recovered.

[Anke]

With a bit of TLC they will recover from really quite bad flystrike attacks. I have a spray from the vets (Strike Plus), its handy to have in your pocket for summer inspections. Kills the maggots quickly, but is as far as I know not a preventative.  (I also use a preventative during the summer, like Vetrazin or CRovect, but you can still get the odd one being attacked).

In bad case/hot weather bring the ewe/lamb inside (with a friend), clip as close to the skin as possible and wash wounds daily with Savlon solution, plus Engemycin or Terramycin (blue) spray. Long acting antibiotic injection also recommended. Spoil her for a wee while with a bit of hard feed. Once the skin dies off I use a soothing cream like udder cream (or other ointment) to help speed up healing.