Deccox vs. Bovatec: Medicated Show Lamb Feed

Flip over almost any bag of show lamb feed and you’ll find the word MEDICATED across the tag — and one of two drug names under it: decoquinate (Deccox®) or lasalocid (Bovatec®). In our database of show lamb base feeds, the split is lopsided: most brands run Deccox, a meaningful minority run Bovatec, and a few brands use both across their line.

Neither one is there to make lambs grow freakish. Both fight the same enemy: coccidiosis — a parasitic gut infection that thrives exactly where show lambs live (confinement, stress, shared pens) and quietly steals gain even when it doesn’t make a lamb visibly sick. Here’s what each drug is, how they differ, and what it means when your show asks about medicated feed.

The disease they’re both fighting

Coccidia are single-celled parasites that damage the intestinal lining. Lambs pick them up from contaminated pens and water. Stress (weaning, hauling, heat) turns low-level infection into scours, rough coats, and lost condition. By the time you see bloody scours, the gut damage that costs gain has already happened — which is why show feeds medicate preventively rather than waiting to treat.

Deccox (decoquinate): the specialist

• What it is: a non-antibiotic coccidiostat — it does one job, stopping coccidia early in their life cycle, and does nothing else.
• Coverage: active against the parasite across most of its developmental window, which is why it’s the standard in creep feeds and starters — protection starts from the first bite.
• How it’s fed: continuously in feed during exposure. Labels call for at least 28 days during risk periods. Typical show feed inclusion runs around 13.6–38.6 g/ton depending on the formulation (the exact number is on your tag).
• Withdrawal: none required when fed per label — but note the tag language you’ll see on many bags: do not feed to sheep producing milk for food.
• In our database: the majority medication — Show-Rite, Kent, Kalmbach, MoorMan’s (Deccox lines), Hi-Pro, Umbarger’s creeps, and more run decoquinate.

Bovatec (lasalocid): the ionophore

• What it is: an ionophore antibiotic — a class of drug that disrupts the parasite’s cell membranes. Ionophores also shift rumen fermentation, so Bovatec brings a side benefit Deccox doesn’t: modestly better feed efficiency.
• Coverage: hits coccidia in a narrower, later window of the life cycle than decoquinate.
• How it’s fed: FDA-approved for confined sheep. Typical show feed inclusion is 20–30 g/ton (roughly 15–70 mg/head/day by body weight).
• Withdrawal: the current U.S. label requires no withdrawal when fed as directed — but always confirm from the actual tag on your bag, because formulations and label versions differ.
• In our database: Umbarger’s main base feeds (Bovatec 25–30 g/ton), Evolution’s HI-PRO and LO-PRO, and MoorMan’s UpNext Lamb 16 BT run lasalocid.

The safety line every barn needs to know

Ionophores are the reason mixed-species barns need discipline:

• Lasalocid is potentially fatal to horses. Never let equines reach Bovatec feed. Dogs shouldn’t get into it either.
• Monensin (Rumensin) — a different ionophore found in some cattle and goat feeds — can be toxic to sheep if it is not mixed properly, and it is not labeled for sheep. Belstra lists Evolution Revolt and Evolution Prime with its goat feeds, not its lamb feeds. Both list monensin at 20 g/ton. They are not sheep feeds. If a bag wasn’t formulated for sheep, don’t improvise.
• Deccox, by contrast, is the boring one — non-antibiotic, wide species tolerance, no meaningful cross-species drama. There’s a reason it dominates creep feeds.

What “medicated” means for your show

This is where feed choice becomes a paperwork question:

1. Read your show’s rules first. Some shows and jackpots require a drug-free declaration. Others only care about substances with withdrawal requirements, and most drug tests target things like ractopamine and painkillers rather than coccidiostats. The rules vary by show — never assume.
2. “Medicated” ≠ “will fail a drug test.” Both Deccox and Bovatec are FDA-approved for sheep with no-withdrawal labels when fed as directed. But if your show’s form asks whether the animal received any medicated feed, the honest answer on nearly every commercial show ration is yes.
3. The tag is the truth. Same brand, same product family, different medications — Umbarger’s base feeds run Bovatec while their creeps run Deccox. Our product pages flag the medication on every base feed we’ve documented, but the bag in your barn is the final word.
4. Truly drug-free rations exist — they’re just rarer, and you take on the coccidiosis risk yourself. That means immaculate pen hygiene, clean water, and watching close during stress windows.

Bottom line

Deccox is the pure preventer — broad coverage, no side effects, no cross-species worries, the default in most show lines. Bovatec is the dual-purpose tool — coccidiosis control plus a feed-efficiency nudge — at the cost of ionophore handling discipline in the barn. Neither should scare you off a good feed. Both should make you read two things carefully: the feed tag and your show’s rule book.

Every base feed in our feeds directory lists its medication status and inclusion rate, so you can filter for what your program — and your show — requires.