No problem. Again, this is my experience with human medicine. I have very little experience with veterinarian medicine, but as a general rule, we find that other than very specific, rare cases, using antibiotics prophylactically is not good medical practice.
For instance, if there's an outbreak of some bacterial illness at a day care, you generally don't give antibiotics to all the kids who are there. We know it doesn't work and creates more problems than it solves. If you have animals in close quarters, is there actually a scientific basis for preventing disease by using antibiotics in these animals?