If our dogs were still wild or allowed to roam free?they would have access to allsorts of natural herbs,weeds and grasses that they could need to survive everyday.We confine them to our homes and provide their so called dietry needs from packets etc?Some breeds of dogs need extra vegetables with their food to prevent things like Anal Sac problems,Terrier breeds are more prone to thisand would benefit from extra veg ev so often,the odd carrot here and there.Did you know that when a dog vomits you should always give them chance to re-eat the Vomit? and then clean up the remainder?Dogs sometimes Vomit so that they can re-digest something not previously digested properly?Sounds foul I know,But hey,thats Nature!!!!!!