Yes, pigs can safely eat onions in limited quantities. Though reasonably nutritious, onions have a propensity to give pigs bad gas, and eating too many might impair blood clotting. This can also impart a bad taste to the pig’s meat.
As it turns out, both camps are half correct. Onions are not lethally toxic to pigs no there is the possibility of harm if they eat too many.
Pigs can derive nutrition from onions but the downside is that regular ingestion will give their meat a funky taste. This is a nuanced subject if you couldn’t tell already, so keep reading to get the full story.
Can Pigs Actually Die If They Eat Onions?
It’s vital to remember that onions should only account for a small portion of your entire diet.
Although pigs can consume onions without harming their health, eating too many onions can be detrimental.
Excessive intake of onions in pigs can cause some serious health issues, especially some varieties of onions that contain ‘haemolytic anaemia’ which can lead to serious complications.
It also causes tainting of meat obtained from the pig leading to inedible bitter-tasting meat.

Advantages Of Pigs Eating Onions
The first advantage is that it gives pigs a different source of nutrition, as the onion is high in vitamins A, C, B6, and K. Onions also contain antioxidants which help keep pigs healthy and provide additional energy for them. Pigs can also eat tomatoes as a nutritional diet.
Disadvantages Of Pigs Eating Onions
The downside of feeding pigs onions is that they tend to get sick if too much is eaten. Pigs should only be given a small amount of onion daily as part of their diet – anything more than this could cause digestive problems or stomach ulcers.
Also, your pigs should not eat chocolate because the alkaloid compound present in chocolate can cause digestive issues to your pigs.
Some people also believe eating too many onions might make a pig’s breath smell bad! Overall, it’s important to remember that while onions have nutritional value for pigs, they should be fed cautiously – moderation is key when introducing new food items into a pig’s diet.
How to Feed Onions to Pigs?
Pigs can eat a wide variety of foods and can dig the earth using their snouts to search for bulbs and tubers. Pigs can eat onions raw it is recommended to boil them beforehand to avoid the toxic effects of the chemicals in the onions and to aid digestion.
Fresh chopped-up onions can be fed to pigs but they tend to give the pigs a lot of gas due to rapid digestion because onions are very low in fiber.
Chopping and hydrating the onions can improve the feeding value of the onions, but care should be taken as due to moisture loss the toxic chemicals are more concentrated per every kilogram of onions fed unlike with fresh onions. It is recommended hence to feed cooked onions as part of a complete pig diet and never as a sole ration.
How many Onions can Pigs Safely Consume?
A percentage of onions equal to 0.5% of the total pig’s body weight can lead to severe toxicity that may lead to death. Also, consumption below this percentage is dangerous but less severe, as any issues caused here can easily be cured.
Onions, like other allium plants, such as garlic and leeks, are poisonous to pigs because they contain toxic compounds, including N-propyl disulfide, which can damage red blood cells and cause anemia in pigs
Additionally, these vegetables contain thiosulfates that can cause gastrointestinal irritation. According to toxicologists, if a pig eats onions equal to 0.5% of its body weight, it can suffer severe symptoms that can lead to death if not treated promptly.
However, even amounts lower than this can also result in various health problems, including gastrointestinal disturbances and hematologic changes, which bring about symptoms such as weakness, lethargy, pale mucous membranes, increased heart and respiratory rates, decreased appetite, and even fainting.