Q. Yesterday my dog suddenly started crying and barking for no reason then earlier this day he behavior change he seems dull then he started throwing up
DAVID ELBEZE, DVM, MRCVS
A. These can be prior signs of vomiting, when dogs feel unwell and are about to throw up they can alter their behavior like that.
If the vomiting stopped, withhold food for 12 hours, then put him on boiled chicken and rice for a couple of days (small portions every 6 hours).
If he doesn't get any better and is not eating or continues vomiting, take him to the vet ang get him proper treatment.