If the vomit looks like it might have dark brown material in it similar to coffee grounds this may indicate internal bleeding. If it is brighter and more yellow in color then its probably bile coloring the vomit. If they ate a lot of bones or chews sticks or toys this might be a sign of a bowel being blocked too.
If you just opened a new bag of food that could be the issue.
This could also be due to intestinal upset from any change in food, intestinal parasites such as worms, coccidia, or giardia, or he could have a bacterial infection such as campylobacter, listeria , salmonella etc. This could also be due to a swallowed non food item, ingestion of something toxic including plants, mushrooms, chemicals, rodent bait etc. Another issue, particularly if the dog had very fatty treats before this started, may be pancreatic inflammation which you can read about herehttp://www.peteducation.com/article.cfm?cls=2&cat=1580&articleid=335 So seeing the vet to find out what is going on should be a priority. An exam, an x-ray plus a check of a stool sample may tell you a lot.An over the counter med you might try would be Pepcid or Tagamet or Zantac. Be sure to tell the vet when you see them if you use any of these. You can read about dose amounts (and cautions) scrolling down on the pages here http://www.petplace.com/drug-library/cimetidine-hcl-tagamet/page1.aspx http://www.petplace.com/drug-library/famotidine-pepcid/page1.aspx http://www.petplace.com/drug-library/ranitidine-hcl-zantac/page1.aspx If that helps then you can see if some bland food and plain pedialyte added to the water bowl will help. I would suggest trying boiled chicken meat or hamburger with the fat drained off, mixed with really well cooked rice in a ratio of 1/3 meat to 2/3 rice to see if that works. It's not a balanced diet but OK to use for a few meals while working on controlling digestive upset. But if they are vomiting a lot, then if you can see your vet with them today you should try to do so.
If your dogs might have gotten into anything toxic, appear dehydrated (see if a pinch of skin over the shoulder blade stays stuck in a tent form or flows back down normally when released), have a rectal temp over 103.5F (normal is 100.5-102.5 Fahrenheit or 38 - 39.2 Celsius ), have gums or tongue that look white, blue, gray or yellow tinted where they are normally pink, have a slow color refill if you press on a pink area of gum or tongue, or are becoming lethargic and non responsive to you then you may want to get the dogs in to see an emergency vet if your vet is not open.
This site may help you locate an emergency vet if you need one
http://www.vetlocator.com/hotline.php
Hope this helps you!
Dog Expert:Rescue, Train,Breed,Care
30+ yrs dog home vet care & nursing, rescue, behavior&training, responsible show breeding, genetics
You are very welcome. Could be bacteira from the ground squirrel or might be the squirrel was poisoned - check with neighbors if they are near by and you didn't use poison on your property.
Thanks for the above accept!