I don't know about long range wormer, but I might help those of you who might not understand STRATEGIC Deworming.
When you deworm is paramount from a cost and effectiveness standpoint.
I don't know why you would deworm cattle this early in the spring IF they were dewormed last fall. It's too early and it
is a waste of money, here in the north anyway. Worms need temperature and moisture to propagate, so cattle that are effectively dewormed in the fall should not need dewormed again until 6 weeks after turnout. Here is a site that talks about it:
http://www.animart.com/Spring-Deworming
Strategic deworming not only cleans up the cattle, it can clean up the pastures. We have customers that strategic deworm and we
have run fecals on their cattle and they didn't need to deworm in the fall for the next 3 years due to their pastures being so
worm-free and thus, so were the cattle. So if you want to get the most for your money, deworm at a strategic time.
rancherfred is right in doing the younger cattle. With all the fecals we run, we have
ALWAYS found higher egg count in the young cattle.
A few years ago a customer that had wintered all his yearlings together. Same program, same feed, same scenery. About a month to 6 weeks after turnout, he noticed one group (he had separated the steers from the heifers) were doing good and the other group
wasn't doing so well. We ran fecals on both groups. We found one group was fairly clean, the other group full of worms. They had to have picked those worms up grazing in the pasture which showed us that one pasture was cleaner than the other one. Running a fecal made him money in that he didn't feed parasites in the yearlings all summer long. He only dewormed the one group.
Deworming is interesting, especially when you run fecals and know what is going on. We send ours to a private lab as most
vets don't have a 'Wisconsin spinner' which shows worm eggs. Most vets use the same thing they use to run fecals on dogs and
they aren't accurate for cattle.
Hope this helps!