PREVENTION AND TREATMENT OF VICE 343 



birds have something to occupy their attention. Feeding in littered 

 floors, supplying dry ground grains in hoppers, and giving cabbages, 

 mangels, and dried meat and fish, all help to prevent vices by giving 

 the birds something to do and to think about. Vices once started 

 spread rapidly. The only effective way to suppress them is by im- 

 proving the conditions. Sometimes a change of quarters and the 

 removal of the worst offenders will stop a bad habit not too firmly 

 established. The reliable cure is right conditions and (if necessary) 

 special attention to keeping the birds busy until they forget the 

 objectionable practice. 



