Calf Dehydration & Fluid Deficit Calculator (Calf Scours)
Estimate how dehydrated a scouring calf is from its signs — sunken eyes, skin tent, depression, recumbency — and the fluid deficit in litres to replace.
Results are calculated in your browser. Always double-check before administering and use your clinical judgement.
How it is calculated
| Clinical signs | Dehydration |
|---|---|
| Few clinical signs | < 5% |
| Sunken eyes, skin tenting for 3–5 seconds | 6–7% |
| Depression, skin tenting for 8–10 seconds, dry mucous membranes | 8–10% |
| Recumbent, cool extremities, poor pulse | 11–12% |
| Death | > 12% |
[1]
Fluid deficit (L) = body weight (kg) × % dehydration [1].
Severely dehydrated calves have lost the suckle reflex and do not stand on their own [1].
Worked example
45 kg calf, depressed with an 8–10 second skin tent: 45 × 8–10% = 3.6–4.5 L deficit.
Frequently asked questions
How do you tell how dehydrated a calf is?
Sunken eyes with a skin tent of 3–5 seconds indicate about 6–7% dehydration; depression, a skin tent of 8–10 seconds and dry mucous membranes 8–10%; recumbency, cool extremities and a poor pulse 11–12% [1].
How much fluid does a dehydrated calf need?
The fluid deficit in litres is body weight in kg × % dehydration — for example a 45 kg calf that is 8% dehydrated needs 3.6 L to correct the deficit [1].
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References
For veterinary professionals. Information supports — never replaces — clinical judgement; always check the current product label and local regulations.