Hi everyone
Paranoid first-time dog owner here so if I’m being a total drama queen please feel free to tell me 
We have a six month old Labrador pup. We’ve crate-trained him at night and he hasn’t had a single accident in the house for about two months - until today, when he did a great big wee under the dining room table! It wasn’t as though he couldn’t get out to the garden either - the back door was open.
Is it normal for them to forget occasionally - I wondered whether it could be the warm day or the onset of his teenage phase - or do you think I should take him to the vet to rule out anything serious like a bladder infection? He’s just been so reliable for ages now so it’s really odd! He seems well though.
Sorry if I’m being ridiculous - I’m just a worrier!