With regard to pasture we have more fly strike, (when flies lay eggs in the wool of the sheep and then you get flesh eating maggots in the sheep not nice) with the sheep when the grass is more woody than when the grass is lush. Lignin, the stuff that makes plants woody is acid. The man in the podcast said that it was better to put the salt in the drinking water rather than as a block and then to offer saltwater and plain water to your animals so they can chose what they wish to drink. It is important to use seasalt preferably organic.
Now we have had some logistical issues with accessing wormer for the sheep so we thought well lets give it a go. I have no data for the affect on worms or pests, but we were all astounded to observe that every single sheep chose to drink the saltwater not just for one day, but every day over a period of 4 days. They still have the choice of one of the other and will always finish the saltwater before the fresh water.
If anyone wishes to listen to this podcast this is the link
Ep. 196 - Steve Campbell - Remineralizing Cattle with Salt on Working Cows with @TuneIn. #NowPlaying http://tun.in/tlkUI9