Pecans are considered toxic to dogs - they should never eat them. That's because they contain a compound called juglone (also present in walnuts), which is harmful to them.
Pecan shells can grow moulds, which can carry harmful substances like aflatoxin. This can cause liver damage over time. Alongside that, pecans can sometimes carry bacteria like Salmonella and E. coli, which can make your dog very ill.
Pecans also contain a high amount of oil and fat, which can cause gastrointestinal problems like diarrhoea and vomiting.
Regularly eating tree nuts like pecans can even result in pancreatitis, which is a life-threatening condition where your dog's pancreas becomes inflamed due to excessive amounts of fat in their diet.
On top of all this, eating hard nuts can cause choking or digestive blockages.
If your dog manages to get their chompers around one or two pecans, it may not be much to worry about (though you'd be wise to consult your vet just in case).
However, feeding them pecans as a regular treat is a very bad idea.
The good news is, well, there'll be more pecans for you!
Again, if your dog eats pecans, you should reach out to your vet, especially if you're observing lethargy, diarrhoea, vomiting, behavioural changes, or other signs of illness.
If your pup ever requires veterinary care due to eating unsafe food, dog insurance can help cover the cost of treatment.