I think my Maltese dog is sick. She's normally really happy and playful, but today she seems really lethargic, droopy, and not herself. I'm really worried about her. Does anyone know what could possibly be wrong?

<moved from Medical Conditions & Diseases to Dogs>

If she is too young to have 3-4 parvo shots, panic. Find a vet tonight. More so she starts diarrhea. See Canine Parvovirus, What you should know about

Maybe it will be OK to let a little older dog that is current with its shots go until Monday.