Hi. I have a six month pointer/terrier mix name sammy. He has been housebroken for quite some time now. However, he has just started to pee and poop in my 3 & 1/2 year old's bedroom. This is the only place he has done this and I am not sure what is bringing it on. I have an older son in which b/t me and him sammy regularly goes outside to do his business. My 3.5 yr old and sammy horse around and play all day but I somehow get the feeling he is doing this on purpose. Any idea's or suggestions? Please let me know.