My 5lb yorkie is 11 and has an enlarged (well functioning) heart and liver. However she has been struggling to breathe. How do we know when it is time to let her go? She still has so much pep in her step and always wants to play. It makes it harder for her to do those fhings. Please help if you think her brain isn’t ready but her body is...please help, we love her dearly and this is horrible. She was prescribed trazadone to help her sleep, it seems to suppress her breathing tho. This is so HARD!