It has previously been thought that the critical period of socialisation in cats ends by 8 weeks of age, after which social experiences have little impact on behaviour. (sciencedaily.com)
Many cats deprived of early socialisation with humans will remain fearful in their presence and unwanted advances and attention can result in the use of aggression as a deterrent. (icatcare.org)
The lack of exercise can lead to destructive behaviour and aggression in Cocker Spaniels Like all dog breeds, early socialisation with children, other human beings and pets will ensure a well developed and gentle temperament. (dogspot.in)