A quiet analytical research laboratory at night, racks of glass vials along a dim bench.

Veterinary Delivery

Animals add three constraints human formulation rarely faces: species-specific metabolism, dosing through feed or water to groups, and palatability that decides whether the dose is eaten. A ruminant digests an unprotected active before the small intestine; a cat cannot clear many phenolic compounds. Encapsulation addresses several of these directly.

Species differences

Ruminants ferment feed in the rumen before it reaches the abomasum and intestine, so nutrients and actives are degraded by microbes unless protected; rumen-protected amino acids and choline are established feed ingredients for this reason. Cats have deficient glucuronidation, which makes acetaminophen and many phenolic compounds, including several essential oil components, toxic to them. Dogs are sensitive to xylitol. Poultry and swine are dosed through water lines where solubility and line fouling matter.

Formats

Feed additives and premixes suit herds and flocks; water-soluble powders suit poultry and swine; flavored chews and tablets suit companion animals; pour-ons and spot-ons deliver topically. Each format has its own stability demands: pelleting heat, water hardness, chewing, and bitterness. Palatability drives compliance in companion animals more than any pharmacokinetic factor. Encapsulated actives must survive feed processing such as pelleting at elevated temperature and steam conditioning, and must not settle out of medicated water. Chews need a shell that tolerates chewing without releasing bitter actives in the mouth.

Regulation

In the US, animal drugs require FDA Center for Veterinary Medicine approval, and feed ingredients need AAFCO definition or FDA review. In the EU, Regulation (EU) 2019/6 governs veterinary medicines and feed additives require separate authorization. Health claims for animal products trigger drug status. Vegalab Biosecurity covers premise and housing hygiene; this page covers delivery to the animal. Formulations that cross into drug claims need a veterinary registration path. Species claims must match the label.

Key facts

Cats lack functional UGT1A6 glucuronidation, explaining their sensitivity to acetaminophen and phenolic compounds (Court and Greenblatt 2000, Pharmacogenetics 10:355)
New animal drugs require FDA approval of a new animal drug application (21 CFR Part 514)
Veterinary medicinal products in the EU are governed by Regulation (EU) 2019/6, applicable since January 2022 (Regulation (EU) 2019/6)

How our delivery technology applies

For ruminants, a multi-layer shell resistant to rumen microbes and near-neutral pH, but eroding in the acidic abomasum, can carry an active past fermentation. For companion animals, an outer layer masks bitterness in chews. For water-line dosing, encapsulated dispersions reduce settling and fouling. Any on-animal essential oil use is excluded; cats are the reason.

Animal health companies: evaluate a veterinary delivery format with Vegalab.