Owners recognise that horses and ponies all have different 'personalities', with varying temperaments, willingness to please and responses to environment and handling. With the exception of some of the miniature breeds, they are bigger and stronger than their handlers. Many behavioural problems can be due to the fact that they have managed to 'get away with' minor misdemeanours and the problem grows from there. In other situations vices and 'bad behaviour' may be responses to boredom, stress environment or management practices. Genetics, i.e. breeding, may have a bearing in some cases.