THE FOUR TYPES OF DOG VOMIT

YELLOW-URKA-GURAKS
Dog runs around the house and hides under the furniture while making a prolonged "uuuurka-guuurka" noise. (this noise is the only thing guaranteed to wake up a true dog lover who is hung over from a post dog show celebration at 3:30 am) After mad scrambling to capture the dog and drag him outside the episode ends with the indelible ten yard line of slimy yellow froth from the living room rug to the back door.

BLAP DISEASE
Dog exercises hard and, (a) eats large mouth fulls of snow (Winter Blap Disease) or (b) drinks a bucket of water (Summer Blap disease).  Within 2 minutes of returning inside the dog spews large amounts of clear slimy liquid while making a distinctive "blap" sound and sharp percussive noise as it hits the linoleum.

GARKS
Dog suddenly clears his throat with loud and dramatic "ggaark, gggark" noises, generally followed by prolonged "iikss" and then loud satisfied smacking noises. There is nothing on the rug. Don't investigate, you don't want to know...

RALFS
Appropos of nothing, the dog strolls into the dinning room and waits until the innocent dinner guests are all watching him. Then with a single deep gut-wrenching "raaalff" disgorges the entire week's contents of his stomach on the dinning room rug. Variation: Then he eats it.

In all the above events, the dog is entirely healthy and indeed deeply pleased with himself.

~Author Unknown~