I am a novice dog owner and don't want to be ringing the vet with every little worry but here is today's scenario:
Freddie (15.5 weeks) ate breakfast as normal (Wainwrights) and did normal poo first thing. At 11 he had 2 lots of diarrhoea, second lot just liquid (but went through cat flap to do it in the garden bless him

) then at 11.30 vomitted. He has had a little drink since then but has mostly been asleep/dozing in his bed or crate. I have just offered him a little chicken and rice for lunch but he is not interested. He does pick up things in the garden and when we are out and he got some popcorn last night when daughters dropped it on the floor. He has been a little up and down in the number 2 department since we got him at 8.5 weeks but he has been OK for the last couple of weeks. For treats he has cooked chicken pieces and in his kongs he gets either kibble, chicken and primula or live yog and mashed banana. Thinking about it he did have 2 puppy kongs with yog and banana yesterday.
I am just leaving him to be quiet in his bed at the moment. If he is drinking, will I be OK to see how he goes tomorrow and ring the vet on Monday if no change or should I ring out of hours service now? It's not really an emergency is it. Sorry to ramble on.