Our 8 year old cavalier has a heart murmur, and is on a lot of meds. She has seemed to go downhill a bit this last couple of weeks. More panting, faster breathing etc but still eating and drinking and peeing etc. We took her to the vets on Monday and they said to increase her meds and they couldn't hear any crackles when listening, didn't seem overly concerned.
She's had a bad few days, has been up and down in the night panting and needing the toilet, then hours when she seems normal. This morning I was giving her medication, it is a challenge as even wrapped in yummy stuff she doesn't always take it. She spat out the tablet in peanut butter and I went to pick it up to give it again and she snapped and then bit my finger. It wasn't a warning snap, she done that and then intentionally bit me. She didn't break the skin but it was a proper bite. I feel so sad. I know she must be in pain, and she has snapped at us before over the years over high value items but never bitten.
Where do I go from here? I know I shouldn't take it personally but man it hurt my feelings and I'm worried how things are going to progress now she's done that. I'm also worried despite what the vet said she's really struggling maybe?