Application
Powder Blending in Pet Food Production
Answer in brief
Pet food blends carry vitamins and minerals at very low inclusion, and the animal receives whatever the blend delivered.
Fat addition changes the mixing behavior entirely, and a blend that was uniform dry can separate once it is coated.
- Pre-blend the minor components.
- Treat liquid addition as part of the mixing design.
- Keep medicated batches physically segregated.
Reviewed October 21, 2026 · Updated October 21, 2026
The problem
Vitamin and mineral premixes at fractions of a percent have to be distributed through a coarse, variable carrier, and segregation during transfer undoes it.
Desired outcome
A blend that meets the uniformity requirement at the point of use, proven by a sampling method that reflects how the product is consumed.
Process approach
Double shaft and paddle mixers handle the combination of coarse meal and fine premix, with liquid addition through spray bars during mixing.
Pre-blending the premix with a carrier improves distribution more than longer mixing.
Segregation control after the mixer matters because the route to the extruder or packer involves drops and surge bins.
- Pre-blend step for minor components.
- Liquid addition designed into the mixing cycle.
- Transfer route designed against segregation.
Selection factors
- Inclusion rate of the premix and the uniformity required.
- Liquid addition rate and the mixing time it needs.
- Segregation requirements for medicated feed.
- Cleaning method between recipes.
- Dust explosion characteristics of the dry blend.
Common failure modes
- Premix unevenly distributed at low inclusion
- Blend segregating in the surge bin before extrusion
- Liquid added without accounting for the mixing time
- Medicated residue carried into the next batch
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