Keeping records is a legal requirement  for all medicines, including antibiotics (and vaccines), administered to food-producing animals.

You must record:

• amounts given
• date(s) given
• batch numbers
• expiry dates
• withdrawal periods, where applicable
• date of first use on multi-dose medicines
• these records must be kept for 5 years

It is important to remember that horses (and ponies, donkeys, asses and zebras) are considered by law to be food-producing species in the European Union.