Dehydration is classified according to the degree of loss of sodium and water into three types:

1-hypotonic (hyponatremic) dehydration

Occurs in acute diarrhea in calves due to excessive loss of sodium in feces from extracellular tissues leading to Severe dehydration.

2-isotonic (isonatremic) dehydration

Occurs when there is a parallel loss of sodium and water in case of simple enteritis, copious sweating

and nephrosis leading to mild dehydration

3-Hypertonic (hypernatremic) dehydration

Loss or deprivation of water with minor loss of sodium

Occurs in animals unable to drink due to esophageal obstruction (Mild dehydration).