A review of the 319 cases indicated. that the development of methemoglobinÂ­. emia after treatment with benzocaine. sprays may not be related to the amount. applied. In many cases, methemoglobinÂ­. emia was reported following the adminÂ­. istration of a single benzocaine spray.
Equine Influenza (flu). Equine influenza (flu) is the most common viral respiratory disease in horses. It affects the upper and lower respiratory tract of horses and is highly infectious, with an incubation period of 1 to 3 days.After contracting the virus, horses can remain contagious for up to 10 days.quine influenza (flu) is the most common viral respiratory disease in horses. It affects the upper and lower respiratory tract of horses and is highly infectious, with an incubation period of 1 to 3 days. After contracting the virus, horses can remain contagious for up to 10 days.
How Many Breeds of Horses Are There. There are approximately 267 breeds of horses and ponies in the world. These fall into four main groups: âlightâ horses with small bones, thin legs and weighing less than 1300 pounds; e.g.