# Copper: Goats Need It, Sheep Can Be Poisoned by It > Goats need copper and tolerate more of it than sheep, Merck says. Sheep can be poisoned by amounts other livestock tolerate. What Extension says about minerals on a mixed farm. Canonical: https://backyardherd.com/blog/copper-goats-sheep --- ## Goats genuinely need copper The Merck Veterinary Manual describes copper as essential: it helps form red blood cells and hair pigment, supports immune function, and maintains the myelin around nerves. Deficiency shows up as anemia, a bleached-looking rough coat and weight loss. Young goats can develop progressive incoordination and paralysis. ## The molybdenum wrinkle High dietary molybdenum pushes copper absorption down and can cause a deficiency even when copper looks adequate on paper. The veterinary rule of thumb: roughly six to ten times as much copper as molybdenum (Merck Veterinary Manual) in the diet. Some regions have molybdenum-rich soils, which is why local Extension advice matters more than a generic label. ## Sheep live under the opposite rule - Sheep are the most susceptible species to copper toxicity, while goats have relatively high copper requirements. - Oregon State’s mineral tables put the sheep copper requirement at 7 to 11 ppm of diet dry matter, and only when dietary molybdenum stays below 1 mg/kg of dry matter - other circumstances change the requirement. - The tables list a maximum tolerable level of 25 ppm, but Oregon State’s own footnote warns that lower levels may be toxic under some circumstances. - The liver stores copper. Once storage capacity is exceeded, a stressor as ordinary as being chased can trigger a rapid hemolytic crisis. ## Practical rules for a mixed barn Keep separate minerals for each species, and feed the goat mineral where sheep cannot reach it. Do not assume an all-stock blend is safe for sheep. Ask before you guess: your veterinarian and county Extension office can read your actual forage and water situation. Oregon State’s mineral tables exist for exactly this: balancing what you feed against the actual requirements of each species. Read the tag on any mineral bag before it goes in the feeder, and when the numbers do not clearly fit both species, they fit one. ## Write down who gets which mineral A mixed barn runs on small details. In the PawLine app you can keep dated health notes per animal - coat or condition changes with dates - so a slow drift shows up in the record before it shows up in a crisis. The mineral schedule itself, which mineral is offered and when it was refreshed, may still need a separate barn log; no pen- or feeder-tracking feature is claimed here. [Get PawLine on iPhone](https://backyardherd.com/go/app/?to=ios&utm_source=goat-companion&utm_medium=website&utm_campaign=auxiliary-guides&utm_content=blog-copper-goats-sheep)[Get PawLine on Android](https://backyardherd.com/go/app/?to=android&utm_source=goat-companion&utm_medium=website&utm_campaign=auxiliary-guides&utm_content=blog-copper-goats-sheep) Available for iOS and Android. Check the store listing for current offers. ## Questions about this guide ### Can sheep share the goats' mineral feed? Do not assume they can. Merck identifies sheep as especially susceptible to copper poisoning. Keep species-appropriate minerals separate and ask your veterinarian or Extension adviser to review the actual diet and access to feeders. ### Can a coat change tell me how much copper to give? No. An appearance change is not a diagnosis or a supplement calculation. Copper can be toxic as well as deficient. Ask your veterinarian to assess the animal and diet rather than treating from this article. ## Sources - [Copper deficiency in goats - Merck Veterinary Manual](https://www.merckvetmanual.com/musculoskeletal-system/lameness-in-goats/copper-deficiency-in-goats) - [Nutritional diseases of goats - Merck Veterinary Manual](https://www.merckvetmanual.com/management-and-nutrition/nutrition-goats/nutritional-diseases-of-goats) - [Copper poisoning in animals - Merck Veterinary Manual](https://www.merckvetmanual.com/toxicology/copper-poisoning/copper-poisoning-in-animals) - [Mineral requirements of sheep and goats - Oregon State University Extension](https://extension.oregonstate.edu/catalog/mineral-requirements-sheep-goats) *General educational information, not veterinary advice or diagnosis. If an animal seems ill, contact your veterinarian - don't wait on an app.* Editorial team · Published October 21, 2026 · Not yet reviewed by a licensed veterinarian [Editorial and sources policy](https://backyardherd.com/editorial-policy.html)