15 year old lab with problems
About 6 months ago I got this 15 year old lab from a fellow who was leaving the country, although he had arthritis he has been an active and loving member of the family. Yesterday about 3:00 P.M. he was acting strangely as exhibited by him backing up rather than moving forward. I put him outside where he woofed up breakfast and continued over the course of the afternoon to intermittently eat grass and vomit, about 3 or 4 times and just laid down in the grass. I brought him in (usually he wants to be in the house but yesterday he had to be coaxed) about 8:00 P.M. and he bedded down for the night. He woke me at 3:00 A.M. and wanted to go out, where he vomited again (not much there to vomit since he is off his feed). He came in this morning about 6:00 and is lethargic and just won't eat anything; tried him on cheerios and milk, no dice; boiled egg, same thing. Other than that he seems well and wags his tail when you pat him. Any idea what's happening here, before I take him to the vet?