Hello again Thom, Sorry to hear Cosmo is a little unwell, however I have worked out an answer for you below ... 1. It is not unusual for dogs to suffer a bout of vomiting and / or diarrhoea after being in kennels, this is often due to a change in feeding
or environment or sometime stress, luckily this sort of situation is rarely too serious. But of course this sort of thing is always a gamble so if you want to be 100% sure you are doing the right thing you should have a vet check him over without delay.That said that there are a number of home remedies for vomiting in the dog which some owners use in situations like this before getting a vet involved, and these can often work well for uncomplicated cases. Here are some examples.1. I am aware that some owners use Pepto-Bismol to treat their dogs with gastro-enteritis and report success. Here is a link to a web page which has all the information you might need including dose rates : LINK2. Some owners try and control the situation with diet
alone before they try anything else. This is logical and often works, the basis of this is to give the intestinal tract a complete rest and then bring it back slowly to function, resting the alimentary tract is the critical factor. It would go something like this ...A. Starve him for 24 hours but make sure he has access to water.B. The next day feed him four or five small light meals in the day. These meals should be the likes of chicken
, fish, scrambled egg etc. with a little rice.C. If he picks up on this diet gradually reintroduce his normal diet over the next few days.3. Live yogurt added to the food or given orally can often help. Some gastro-enteritis situations are caused by an imbalance in the bacteria in your dog's gut. Live yogurt is full of " good " bacteria and will seed them into your dog's intestinal tract and restore the balance. A couple of tablespoons twice a day should be fine for a larger dog like Cosmo.Of course if any of the above does not quickly start to work or if he deteriorates further in any way you should have your vet check him over just to be on the safe side.I hope I have covered your question fully enough but if you would like further clarification or to talk things over a bit more then I will be on-line for the next hour or so and I will be more than pleased to continue working with you.Regards, ***** ***** be kind enough to rate my service to you after we have concluded our dialogue, such feedback helps me maintain the quality of my answers.