My older girl, Berry is acting lethargic, puffed up fur, and has her eyes mostly closed. I know she's uncomfortable but I don't know what's causing it. I finally got an appointment with the vet for 5 with is a couple of hours but I'm still worried. She won't eat or drink. Is there anything I can do to help her drink while I wait to take her to the vet? She's around a year and a half and somewhat overweight so I'm worried about her.