Q. Small dog. 10lbs. Constipation
A. Is it an ongoing problem or has it only just started ? Sometimes constipation is secondary to bones ingestion, the calcium in the bones absorbs lots of water causing impaction. If you haven't fed any bones and it's an ongoing problem, it could be that your dog is bot getting enough water, make sure fresh water is always available and that you encourage him to drink. You can also try adding fiber to his food, 1 spoons of bran per meal, if no improvement increase to 2 spoons. If not sure please see your regular vets.