Hi, I’m hoping somebody has some advice or similar experience that could help. We have a Bedlington Terrier who from the age of 6 months one day when unwell and had an infection in the penis and testicles started becoming randomly aggressive. He now randomly displays this behaviour however you are not able to tell when it’s about to start. He only displays signs of this when possibly laying on your lap for a stroke or groaning and rolling on his back, he then shows his teeth to which we then stop. He then goes on to groan again as in for a stroke but raises his teeth. He also displays this if eating a chew on your but if touched he growls (sometimes aggressively barks). He has a good routine of sleeping in his bed - he never sleeps in our bedroom however he may sleep on the bed if we’re in there however when we go to take him downstairs for the night again he growls. He has been well socialised with other dogs and gets on great with them. I’ve had dogs all my life, however he is the only one who seems to display traits like this and I feel as if we’re doing something wrong or something is wrong with him. It does however seem strange to me that he would come to us for a stroke, then growl and bite when we actually go to stroke him. It’s very hot and cold behaviour but I cannot seem to get to the root of it. He has yet to be castrated and we are planning this but not sure whether this will curb the behaviour. Any questions or advice would be appreciated.