Loose, watery stools and vomiting can be caused by all sorts of things, ranging from the relatively innocuous (dietary indiscretion) to the serious (metabolic problems). Sometimes it's nothing to fret about, but if it's happening frequently, a vet visit is usually in order.
If your poodle has occasional diarrhea and you can figure out a relatively harmless cause (stress or excitement or a snack of spicy food, for example), it's not something to worry about. In general, it's a good idea to let diarrhea run its course, since the body uses diarrhea to flush out toxins.
When your dog has diarrhea, withhold food for 12 to 24 hours, keeping water available so he doesn't become dehydrated. Then feed bland food, like boiled chicken or hamburger (with fat rinsed off after boiling), or scrambled or soft-boiled eggs accompanied by cottage cheese or white rice. Slowly ease him back to his regular food.
However, if the diarrhea occurs frequently, lasts more than two days, is bloody or black, or is accompanied by vomiting, weakness, or fever, give your vet a call. Together, you should try to find the source of the problem and address it.
Vomiting can also be caused by a number of factors. Something as simple as stress or drinking water too fast might make your poodle vomit. If he regurgitates his food right after eating, then tries to eat it again, he may have just eaten too fast.
If your dog vomits just once and seems to feel well otherwise, don't worry too much about it (though it's a good idea to mark it on your calendar). If your dog vomits a couple of times but is otherwise healthy, withhold food for twelve hours, then feed him a small amount of bland food.
If your Standard Poodle is uncomfortable and tries to vomit but is unable to do so, feel her belly. If it's hard or distended at all, she may be bloating. Bloat is a medical emergency in which the stomach fills with air or gas and twists. If you think your poodle might be bloating, rush her to the emergency vet.
If your dog is vomiting violently and frequently, or if the vomit smells like feces or contains blood, contact your veterinarian. If the vomiting is accompanied by severe diarrhea, a vet visit is also in order.
Lack of Appetite
If your poodle normally scarfs down everything you put in front of him, lack of appetite can be an important indicator that something is up. Not wanting to eat is a sign of a number of illnesses, including Addison's disease and cancer. It can also be a sign of poor dental health or infectious disease. Of course, it can also just be a message that your poodle doesn't like what you're feeding him! If your poodle refuses to eat, first try offering him something else. If he won't eat anything and he seems to be feeling poorly, take him to the vet.