I need some suggestions please! This is my second week with my 4month old yorkie. He does ok with potty during the day because I watch him close but at night. His last meal is at 3 pm and water at 6pm, bedtime is 10 pm. He always poops and pees before bed as well of course during the day but he ALWAYS poops in his crate every night! How can a 3lb dog have so much poop and how can I stop this, thanks!