Blood Reagents

•         Solution A: Dissolve 1 g of N, N-dimethylanaline in 100 ml of acetic acid and 150 ml of distilled water.

•         Acetic acid

•         Hydrogen peroxide (3 per cent)

Procedure

Place a few particles of feed sample on a slide. Mix 4 parts of solution A with 1 part of 3per cent hydrogen peroxide. Add 1 to 2 drops of this solution on feed sample.

Positive results

If blood is present, a dark green colour will develop around the feed particles. Low magnification stereo microscope can be used to observe the colour.