I got an English Mastiff puppy at 8 weeks. He is now about 12 weeks and weighs about 45lbs. He is georgeous but I just have a few questions reguarding training. He is in a pen while I am at work, I didnt want to krate bc he is so big. He started using the bathroom in his pen now so I krate him at night and while I am at work. I am not sure what promted this as we havent changed anything or his bathroom schedule. He use to cry to let me know when he had to pee but now only cries when he needs to poop. Not sure what is going on but any suggestions would be appreciated. Also any suggestions to help with his teething, he has plenty of different types of toys but would rather chew up everything else??? He chewed up his bed and now sleeps on a baby blanket bc those beds are expensive and dont wana buy more everytime he chews them up... Thanx for any help.