The most practical solution to this problem is strict regulation of the use of antibiotics in animal feed.  For example, a recent AABP newsletter outlines recommended uses of antibiotics in animal feed.  In summary:
 

• Use antibiotics only to treat infection.
• Choose an antibiotic or antibiotics that are specific for the particular pathogen.
• Choose antibiotics which have the narrowest spectrum of application possible.
• Choose an appropriate dosage of the antibiotic to effectively kill all of the bacteria without harming the animal.
• Do not prolong antibiotic use.  Use for the shortest period of time possible while still killing all of the pathogen.
• Consult past records to evaluate these factors, and keep clear records of your own.

    Many of these concepts can also be applied to the prescription of antibiotics for humans.  Antibiotics should be given only when necessary.  They should also be as specific as possible for the particular pathogen to minimize the number possible resistant organisms.  It is also important for doctors to remember to emphasize the importance of patient compliance in taking all of the prescribed medicine.