Hi all I have a very mild natured dog. He loves playing with other dogs on walks and with our other dog, also fine with people and children. Just lately he has shown aggresion towards other dogs when on the lead. No biting, just growling and barking. It strange as he loves other dogs off the lead. Also on a sepearte issue our 2 dogs male Border terrier (2yrs) and male Aylesone Bulldog (13mths) are house trained but seem to pick and choose when they abide by it. They can both hold it for long periods but some days we come home and there is a right mess. Also they can be very destructive when left alone, ripping beds, chewing everything, marking etc etc. They have plenty of toys to chew.