The second and fourth metacarpal bones in the horse are commonly called the a. splints. b. cannon bones. c. shins. d. navicular bones.

The correct answer is option A, splints.

Explanation:

The second and fourth metacarpal bones are all together called as splint bone in horses that are remaining part of 2 of the 5 toes of primitive or ancient horses, go down to any side of the cannon bone. They become narrow as they go down from the tarsal or carpal joint.

Thus, the correct answer is option A.

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.