So our 10 year old chocolate lab Archie has suddenly been sick while we are in bed and around 10 houres after eating ,he is fed at 5 pm and he has dried food mixed with wet food at tea time ,in the morning he only has tins I’m wondering If he can no longer digest the dried food he ha a non cancerous polyp that’s started on his bottom and has now grown along the whole of his anus that is inoperable and takes loxicom for pain and lactulose to help his stools stay soft . The sickness has been for 7 consecutive nights now he is otherwise behaving as normal and very happy and eating and drinking well .