7 month old springer has been a bit off colour since yesterday morning. She normally scoffs her food but hasn't really been interested yesterday and not at all today. She hasn't drunk anything either this morning. She has also has blood in her stool both days. She has been out for a walk both days & happy to run around but especially today seems really lethargic & shivery inside. Is it an emergency vet situation or ok to wait until tomorrow? She is up to date with worming etc. First time dog owner so not sure what to do?