The habit of eating rocks can be extremely dangerous because it can lead to a blockage and necrosis of the gut. Has he held down anything at all, or is he just vomiting up a bit of one meal each day? Is he refusing any meals? Is he drinking and keeping water down or does it come back up too? Does he act lethargic or stand with an arched back (indicating pain)? Has his condition worsened over the last three days?
I think at the least, (no real symptoms other than one small spit-up every day) I would go to a vet tomorrow, even if your vet is not available. If he is showing any "extra" symptoms like those I listed above, I would find an emergency vet and head there today.
It is impossible to see a dog's condition over the internet so I would err on the side of caution. Better to make an extra trip to the vet than face other horrible possibilities from waiting too long.
I think at the least, (no real symptoms other than one small spit-up every day) I would go to a vet tomorrow, even if your vet is not available. If he is showing any "extra" symptoms like those I listed above, I would find an emergency vet and head there today.
It is impossible to see a dog's condition over the internet so I would err on the side of caution. Better to make an extra trip to the vet than face other horrible possibilities from waiting too long.