Hi, could really do with some help please. We have a 5 year old large cross breed who has a problem when it comes to cutting his nails. He just wont let us do it. He gets distressed and gets angry when we try. We have tried treats and desensitation on both touching his nails and introducing the clippers but despite all efforts he simply wont let us. His nails are really long and we are really worried so any ideas would be appreciated.