What was prescribed for the redleg? I would just continue using what the vet gave you and if its not working bring him back there and you guys may want to try something else from the vet. Remember even with human antibiotics you have to give it a couple days to actually kick in and start to work and I noticed you just brought him a couple days ago so it may not have kicked in yet. If you went to the vet and they gave you something you don't want to start mixing home remedies with it because it could counter act against the meds possibly and then he really wont get better.