My spaniel is now 11 months old. He was house trained within 2 weeks of buying him and he never had any accidents after this until now. He has suddenly started weeing on the lounge carpet every now and again. He never wees anywhere else in the house and is still dry at night. We have just come back in the house now after being at dog training class (ironically) l opened the back door for him in case he wanted to go outside but he didn't. He was in the lounge with me whilst I was looking at mumsnet and I heard him weeing on the carpet again. I don't understand why he is not letting me know he wants to go out when he has been so good all these months. Can anyone offer any suggestions?