There is a phenomenon called gastrocolic reflex that can make a child pass stool after each feed. It may persist in some children. That seems to be the case in your child. It is normal and does not require treatment. All you have to do is to give ORS (oral rehydration solution) to prevent dehydration from developing. Antibiotics like oflomac are unlikely to be of help but if you have started it please complete the course. No medicines or precautions are required if the child is active and fine. But if the child grows lethargic you will have to take the child to a doctor without delay. For the diaper rash, you will have to keep the area open to air and let it remain dry for some time. It occurs due to excess of moisture. Application of some emollient or ointments like Siloderm Mixi should provide relief.