My budgie's poop smells awful, but he seems fine. What's the cause?

Diet changes can affect the stool, and if you're feeding any extras in addition to the diet change, this could be causing the change you are seeing. It is also possible that his current diet is causing some minor GI upset if it changes immediately after eating and then returns to normal. Other issues such as internal parasites can also cause stool changes, so ruling out and treating for any parasites may be a good idea. Removing any extras such as fruit and veggies and providing only his balanced diet for a few days may also help him adjust and his stool return to normal. If the problem persists, or you see any other symptoms or changes such as reduced eating/drinking, lethargy, etc, then seeking vet care in person to rule out any more serious issues is best.

Submit a sample to your veterinarian to diagnose parasites or bacterial/fungal overgrowth. Discontinue feeding fruits and vegetables until the stool is normal, then introduce one at a time slowly. Clean and sanitize the cage, bowls, toys and perches. Discard anything that cannot be sanitized. Use paper towels on the cage bottom and change them daily until his droppings are normal. Provide plenty of fresh, clean water. Keep him warm and as stress free as possible. If he develops lethargy, loss of appetite or if the droppings don't begin to firm up in the next 24 hours, have him examined by your vet or an experienced avian vet.

If you're only noticing the watery stools on occasion, one of my first thoughts would be diet-related. Some veggies and fruits can cause watery stools, and if you notice this happens after giving them a new treat or something to snack on, it could be related. Removing all extras for a few days and seeing if the stool improves can help determine this. If it isn't food related, additional issues such as internal parasites, stress, diet changes, GI upset, infections, etc can also be possible causes. Keeping them in a low stress area, and scheduling a veterinary visit if the loose stools continue or other signs of illness such as listless behavior, weight changes, not eating or drinking, etc appear is best.

Budgies hide ill-health well, and a dirty vent might be your bird's only symptom. Sometimes diarrhea only lasts a day or two, but longer-lasting problems indicate a more serious condition, requiring a visit to the vet. Dangers of diarrhea include waste build-up due to clogged vents, and intestinal damage from blocked ducts. Diarrhea makes him at risk from dehydration, weakness, lack of appetite and weight loss. Extreme cases lead to fits and starvation. Checking your bird's poop when he has a dirty vent can give useful information. Normal droppings are soft, olive-green to brown and coiled or cylindrical. Poop that's very dark, very pale, liquid, lumpy, dry, sticky or bubbly mean illness and need vet attention. Green-stained vents often mean poor quality feed and usually appear within 24 hours of eating new food. Providing healthier food should make symptoms disappear. One check of feed quality is biting. Grains should split cleanly and be hard to bite. Intestinal inflammation causes most diarrhea in budgies, due to bacterial or fungal infections. Vets can test for infections and treat with antibiotics. Worms, gut changes due to abnormal growths, viruses, liver disease and problems with egg production can also cause diarrhea. Less obvious causes of upset tummies are stress from a change in environment and over-use of antibiotics, causing an imbalance in normal gut bacteria. Vets can use probiotics and prebiotics to re-introduce healthy bacteria. Sick budgies need to be kept warm to conserve energy, and clean water is important in preventing dehydration. When he's lost his appetite, tempt your bird with his favorite treats, or offer specially-designed, easily digested feeds. Some budgies love soaked millet sprays. Cold, sweet black tea provides fluids and energy from sugar, and tannin in tea coats his intestines. Intensive nursing can often help in cases without a specific cause.

Thank you for your question about Blue. I am glad that you asked, as no, this is not a normal color or consistency for budgie feces to have. I didn't see how old Blue was, or if she was on any medications, but I would recommend that you have her evaluated by a veterinarian. Dark, tarry stool like what you are describing may be due to digested blood. This can be secondary to some medications, certain toxins if she has gotten into something, or can be due to certain diseases of the intestinal tract. Your veterinarian can gather a detailed history from you which may reveal the cause, and will perform a thorough examination. From there, they may have recommendations for diagnostic testing. If possible, bring pictures, or even better a sample, of the stool for them to look at. They may also prescribe medications for Blue. Please do not give her any human medications, as many of these are harmful for our feathered friends. I hope that gives you a place to start, and that Blue feels better soon.

Seed and pellet colors can sometimes affect stool color, especially if the birds are otherwise healthy and acting normal. However, stool color can also sometimes be affected by issues such as parasites, illness, etc and birds are great at hiding it sometimes. Bringing in a sample of stool to your vet for testing, or keeping an eye and watching for any signs of sick birds may help figure out any possible causes.

Looser stools can be caused by a number of things. If you've recently given Sky a bunch of snacks (such as fruits and veggies) or changed her diet, this can cause temporary stool color changes or moist stool. Removing any extra treats and letting her adjust to her new diet for a few days may help. If she has differently colored pellets in her food, this may also cause color changes to the stool as well. Other causes can include parasites, GI upset, illness, nutritional issues, metabolic issues, etc. If she didn't have a diet change or any snacks, or is showing other signs of illness in addition to the loose stool/color change (you mentioned she is less active), then having her examined by a vet is best. They can treat her for parasites and help rule out any more serious underlying conditions that may require treatment.