Here is a local article I found:
Clover takes toll on cattle herd
By JOHN FRIEDLEIN
jfriedlein@thenewsenterprise.com
This spring’s clover explosion not only has made local lawns look like scenes of a popcorn spill, it has killed several cows in Hardin County within the past month.
Weather conditions led to problems with the legume. The situation seems to be improving, though, said Hardin County Extension agent Doug Shepherd.
As the plant matures it causes less of a problem for cattle and its growth slows in the summer. Also, clover outgrew grass in early spring — which was cool and dry — but as the grass catches up, it dilutes the effect of clover.
The plant can cause gas to swell in one of the animals’ stomach chambers, putting pressure on the lungs. “They basically suffocate,” Shepherd said. Treatment can include surgery or anti-bloating products.
Reports in the state of this condition — called frothy bloat — range geographically, roughly from Grayson County to eastern Kentucky to Cincinnati, said Jeff Lehmkuhler, an extension beef cattle specialist for the University of Kentucky.
Agriculture Commissioner Richie Farmer has asked state government for a disaster declaration.
“Kentucky producers take in about $600 million in cash receipts from the sale of cattle and calves in a normal year,” he said late last month. “I will continue to monitor the frothy bloat situation, and I will pursue every option to help our cattle producers get through this crisis.”
There are several ways to prevent this from happening. For instance, producers can refrain from letting cows in pastures either while they’re hungry or in the morning when fields are dewy. A mineral treatment earlier in the year could help, too.
Also, it’s not so much a problem if cattle are used to feeding in fields mixed with clover. “My cows are kind of conditioned to it,” said Rineyville cattleman Chuck Crutcher, who has not lost any animals to the bloat.
http://www.thenewsenterprise.com/cgi...62434053053008