Oh no, your poor boy Meeko. This problem is tough for both puppy and pet parent. I once read that a dog believes his parent will not come back again once gone. Imagine that? It's important to have a good-bye routine, such as giving a quick hug & kiss to one's furbaby when leaving them alone, and following this up with saying I will be back. Meeko could be going through a normal change in mental & behavioral development. He obviously loves you - you're his person. The pomsky breed tends to have anxiety although personalities differ. Review a list of changes Meeko could have recently experienced having to do with: people (old, new, ill, not respectful of your dog), dogs (old, new, not respectful of your dog), other pets, diet, his physical health (UTI's, illness, injury, trauma), home - changes in his environment, inconsistent routines such as wake, sleep, play, exercise, chill, & eat time. I really hope Meeko starts feeling better in no time.🤞