Dog has started barking when entering garden??
Lately my 18 month male german shepherd has started barking really loud and aggressively when he goes out in the garden to do the toilet which hes never done before. When I let him out his hackles will be raised his tail will be up and the teeth will be bared and he will growl and bark for about 30 seconds, he has never had any bad expierances in garden this has just started happening the past week and if anything is in the garden like birds cats ect will be chased out. is this behaviour normal? and how can I stop him?