I know dog health but this kinda urgent & more folks look here.

My friend just called, the one whos staying with me, Nanook won't stop puking. About 10 piles in 10 minutes.
We did run out of his pain meds so I gave him buffered asprin this am. I checked with the vet yesterday & they said it's ok to give him asprin till I can get back there for more meds. He's never had a problem with asprin before & he's had it often but it has been 2-3 months since he's had it last.

Some of his vomit has whole dog food in it. He ate at 6 this morning and I know he had none since then. Has anyone heard of a dog vomiting up whole dog food almost 9 hours later? Or what would cause that?

My vets in surgery and will call back in a little while.