But another possibility came to my mind,maybe you understood what I meant wrong.By chaining dogs,I meant,chaining the dog to a place for long periods of time,for example,chaining the dog to a backyard for long periods of time,I do not mean chaining for walking with him,I don't mean chaining a dog to a tree for a short period of time too.Chaining a dog to a backyard and then not giving attention to him can make him aggressive,I think this is logical,isn't it?But if I had meant chaining him for walking with him or similar things,yes it would be nonsense.