It might be a good idea to blend his food.His stomach needs a rest.Whether
its a tear or some type of parasite it needs to heal.When they are so small
they don't have any reserves and any rough textured foods could cause a
bleed again.Most importantly make sure he drinks water.Sounds like he is active
and playing so hopefully he is on the mend.Glad your taking him back to the
Vet.
