7 Weeks ago our 12 yr old dog suddenly passed away. Our 11 yr old cat seemed to be grieving but doing ok (eating and using the bathroom ok). We brought home a puppy not long after and our cat wasn’t pleased but still was eating and using the bathroom as usual. Last week we went on vacation and took him to my parents house, which is a very familiar place for him to be, without the puppy. It took him 24 hrs to use the bathroom there but that has been pretty typical of past visits. After the 1st 24 hrs he ate and eliminated normally for the 9 days we were gone. He seems none to pleased to be coming home and peed all over the place as my husband picked him up to put him in his carrier. He then pooped in the carrier on the ride home. That was this past Monday and he has yet to poop since. On Wednesday we noticed that he had only peed 2 small places in his litter box and unfortunately peed all in our dogs (the one who passed) bed. Since then we have only been able to get him to pee in his litter box by physically taking him to it. Yet he is walking normally eating treats and food and behaving normal. Does this sound like he is possibly being a stubborn, grieving and unhappy cat or something that we need to take him to the vets for? I fear if its only behavioral a trip to the vet may make it even worse since he struggles with being moved around even before his best buddies passing. Thank you!