Experienced and professional animal trainer provide their insights in answering this question :
A. It is not a good idea to feed any dog especially larger breed dogs within a couple of hours either side of exercise. It can cause a serious problem called gdv where the stomach twists. This can cause death very quickly.

How to Identify Common Pet Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced pet care professionals :

Usually, it`s regurgitation. Your dog may have eaten too much, too fast, or they may be suffering from stress. Megaesophagus is also a possibility, so you`ll want to check with your vet to be sure. If your dog is vomiting, it usually happens at least a few minutes after your dog has eaten.
There are self-inflicting things a dog can do to cause vomiting. Some other causes of throwing up are overeating, eating too fast, too much exercise immediately after eating, motion sickness, stress, or a case of worms.
Dehydration is also a reason why dogs vomit after exercise. Either they get too excited about their activities, or there`s no water source available while they`re doing the exercise. Either way, this can make the dog breathless, nauseous, which will later result in vomiting.
After a dog vomits, it`s generally best to withhold food for several hours and observe, but don`t withhold water. 2 If your dog vomits one time and then acts completely normal, you can probably resume your normal feeding routine within six to 12 hours or when the next meal is due.
Many dogs will stop vomiting first thing in the morning if given a midnight snack just before bed. This works to help prevent stomach acid build up. Some pet parents whose dogs suffer from bilious vomiting may also choose to leave out puzzle feeders or kong toys with snacks in them that dogs can work on overnight.
Some dogs vomit when their stomachs are empty for too long, perhaps because of irritation from the stomach acid that collects there. This is commonly called empty tummy syndrome, or more formally, bilious vomiting syndrome.
It`s not automatically a big deal if your dog vomits. But if they throw up more than once or twice in 24 hours, you notice blood, darker colors, or the appearance of “coffee grounds” in their vomit, or their behavior changes, you should contact a vet as soon as you can.
Prompt attention from a veterinarian should be sought if your dog vomits multiple times in one day or for more than one day in a row. In addition, you should seek veterinary attention if your dog shows the following symptoms accompanied by vomiting: Loss of appetite.
Running is a high-impact, cardio-intensive exercise, and unless your dog has been cleared for this activity, he can be at risk for injury — or worse. Joint problems, like hip dysplasia, luxating patellas and arthritis, can make running painful or even impossible.
If your dog has been vomiting frequently or it has become a long-term or chronic issue, this is cause for concern, especially if you`ve noticed symptoms including abdominal pain, depression, dehydration, blood, poor appetite, fever, weakness, weight loss or other unusual behaviors.
Keep your dog warm and comfortable.

After your dog has vomited, reassure him that he`s done nothing wrong. Try to get him to lie down and rest. If he seems cool or is shivering, put a blanket over him and give him plenty of attention and support. Let your dog take it easy.

Gastric hypomotility typically occurs in older dogs, and results in vomiting undigested or partially digested food hours after eating. This cluster of diseases can be primary or secondary, meaning it is caused by a stomach issue vs something outside of the gastrointestinal tract, respectively.
If you think your dog may be experiencing acid reflux, watch for these symptoms: Decreased appetite. Retching, burping, or gagging after eating. Lip licking (indicating nausea)
Dogs sometimes vomit up yellow foam. This yellow foam is a form of bile, or digestive fluid, that is produced in the liver, stored in the gallbladder, and released into the small intestine, just below the stomach. This yellow foam usually means that its stomach is empty and the bile is causing stomach irritation.
Putting food into an upset tummy is irritating and makes it more likely that vomiting will continue. Take your dog`s food away for 12–24 hours, and don`t give them any treats or table scraps.
Keep in mind that a sick pet should be kept in a quiet environment and may prefer to be left alone. Make sure that young children and other pets do not bother the sick one. You may need to keep your sick pet in a separate room or area of the house.
Signs of an Upset Stomach in a Dog

The most obvious symptoms are vomiting, diarrhea, pacing, or loss of appetite. If your dog is having severe vomiting, fever, or bloody diarrhea, you need to visit a vet immediately. Any of these symptoms may signal that something serious is going on with your dog.

Chronic vomiting in young dogs is often due to parasites or a food sensitivity. It can also be caused by certain diseases or health issues. Bloodwork, X-rays, ultrasounds, or biopsies are often necessary to diagnose the problem.
Consuming garbage, fatty foods, and table scraps. Ingesting bones, rubber balls, stones, hair, sticks and other foreign objects. Intestinal parasites, such as roundworms. Viral infections, such as distemper, parvovirus and coronavirus.
If your dog throws up once or twice, it`s likely no cause for concern. But vomiting more than that can be a sign of a serious or potentially life-threatening illness that requires attention by a veterinarian.
Fit, healthy, adult Labradors can make fantastic running companions. In fact, any healthy dog can enjoy accompanying you outdoors as you jog or run. Labradors make especially good running companions because they enjoy exercise, and they love being together.
Labs, beagles and English setters are good for distances up to 10K, but if you want to spend more quality time with your pet, huskies, Goldendoodles, Weimaraners and Vizslas enjoy 10-mile-plus distances.
One of the most important yet often overlooked, is whether or not your dog has eaten. Many people think that it`s fine to exercise their dog before or after meals, but the truth is that whilst for most dogs, it`s okay, for some, it can be very dangerous and result in bloat or GDV (Gastric Dilatation Volvulus).

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. Lab is throwing up repeatedly after a long run. She had breakfast before running. Should I be worried?
ANSWER : A. It is not a good idea to feed any dog especially larger breed dogs within a couple of hours either side of exercise. It can cause a serious problem called gdv where the stomach twists. This can cause death very quickly.

Q. My. Dog seems to be eating grass and throwing up is it true dogs eat grass To settle their stomach
ANSWER : A. If the dog pukes after he has eaten grass, then he ate the grass too late to help settle his tummy. Yes, they do use grass to settle their tummies.. it’s sort of like us eating lots of fiber. If he is throwing up every meal, AND throwing up water.. you may need to bring him to the vet. If he just throws up once or twice, I wouldn’t worry too much about it as long as he is drinking water and keeping it down.

Q. What can I do to stop my dog from barking at people and front doors?
ANSWER : A. Ignore your dog’s barking for as long as it takes him to stop. This means don’t give him any attention at all while he’s barking. Your attention only rewards him for being noisy. Don’t talk to him, don’t touch him, and don’t even look at him. When he finally quiets down, even to take a breath, reward him with a treat. To be successful with this method, you must wait as long as it takes for him to stop barking. If he barks for an hour and you finally get so frustrated that you yell at him to be quiet, the next time he’ll probably bark for an hour and a half. Dogs learns that if they bark long enough you’ll give them attention.

Teach your dog the ‘quiet’ command. It may sound nonsensical, but the first step is to teach your dog to bark on command. Give your dog the command to “speak,” wait for him to bark two or three times, and then stick a tasty treat in front of his nose. When he stops barking to sniff the treat, praise him and give him the treat. Repeat until he starts barking as soon as you say “speak.” Once your dog can reliably bark on command, teach him the “quiet” command. In a calm environment with no distractions, tell him to “speak.” When he starts barking, say “quiet” and stick a treat in front of his nose. Praise him for being quiet and give him the treat.

When your dog starts barking, ask him to do something that’s incompatible with barking. Teach your dog to react to barking stimuli with something that inhibits him from barking, such as lying down in his bed.

Make sure your dog is getting sufficient physical and mental exercise every day. A tired dog is a good dog and one who is less likely to bark from boredom or frustration. Depending on his breed, age, and health, your dog may require several long walks as well as a good game of fetch and playing with interactive toys.

Q. Is bad for my dogs to go running for long distances with me 6 days a week? They are 1 and 4 years old and have a lot of energy.
ANSWER : A. It depends on the length of run and the dogs health. I wouldn’t recommend allowing them to run on hard surfaces but grass would be ok. It will be a matter of gradually introducing it and seeing how they cope.

Q. I got a lab puppy.this evening.she start throwing up.she has worms that look like noodles.I’m taking her to my vet at 8.am.she seems to be constaped.
ANSWER : A. Roundworms are the most common intestinal parasite in pups. If she vomited up long, white or light brown worms, be highly suspicious that she has roundworms. Carefully scoop up the worms in a plastic bag. Your vet will confirm what they are at the appointment. Do not feed her any food, allow small amounts of water or unflavored PediaLyte. The good news is that the worms are easily treated. Your vet will give a dewormer in the clinic and you will likely need to repeat it once or twice more in the coming weeks. The constipation may be related or it may be stress related from being in a new home.

Q. My cats whiskers ate getting really long can should I worry and trim them or should should I leave it alone?
ANSWER : A. Do not trim the whiskers. Cats needs them being long and it takes long time for whiskers to grow back.

Q. My lab/ retriever mix just had a seizure, had one about 3 years ago. Is there anything I should do or worry about. After the seizure she seems fine.
ANSWER : A. I would monitor and if has any more then see your vet. The vet won’t treat them unless they start to happen regularly as she may not have another one ever or for a long time as you know. The length of the seizure is also important if they last for a long time then more likely to treat. There is no way of knowing what is causing them without expensive tests like ct or mri.

Q. Whenever I take my dog on walks he always barks at people and others dogs in my neighborhood. What should I do to resolve the problem
ANSWER : A. The very first thing to do is to make sure your dog is getting sufficient physical and mental exercise every day. A tired dog is a good, happy dog and one who is less likely to bark from boredom or frustration. Depending on his breed, age, and health, your dog may require several long walks as well as a good game of chasing the ball and playing with some interactive toys.

Figure out what he gets out of barking and remove it. Don’t give your dog the opportunity to continue the barking behavior.

Ignore your dog’s barking for as long as it takes him to stop. That means don’t give him attention at all while he’s barking. Your attention only rewards him for being noisy. Don’t talk to, don’t touch, or even look at him. When he finally quiets, even to take a breath, reward him with a treat. To be successful with this method, you must wait as long as it takes for him to stop barking. Yelling at him is the equivalent of barking with him.

Get your dog accustomed to whatever causes him to bark. Start with whatever makes him bark at a distance. It must be far enough away that he doesn’t bark when he sees it. Feed him lots of good treats. Move the stimulus a little closer (perhaps as little as a few inches or a few feet to start) and feed treats. If the stimulus moves out of sight, stop giving your dog treats. You want your dog to learn that the appearance of the stimulus leads to good things.

Teach your dog the ‘quiet’ command. Oddly, the first step is to teach your dog to bark on command. Give your dog the command to “speak,” wait for him to bark two or three times, and then stick a tasty treat in front of his nose. When he stops barking to sniff the treat, praise him and give him the treat. Repeat until he starts barking as soon as you say “speak.” Once your dog can reliably bark on command, teach him the “quiet” command. In a calm environment with no distractions, tell him to “speak.” When he starts barking, say “quiet” and stick a treat in front of his nose. Praise him for being quiet and give him the treat.

As in all training, always end training on a good note, even if it is just for obeying something very simple, like the ‘sit’ command. If you dog regresses in training, go back to the last thing he did successfully and reinforce that before moving on again. Keep sessions short, 15-20 minutes max, and do this several times a day.