I'd like some advice/input from seasoned dog owners. I have a 4 month old puppy. I was expecting biting, but lots of the articles I read talk about biting when playing, i.e. when getting overexcited with a toy. Our puppy does this, but some of the biting happens when he we are trying to redirect inappropriate behaviour, for example chewing furniture. If I had to describe it in human terms (I know, I know), like he's pissed off we're stopping him doing what he wants. It is worse when he is tired. He'll also occasionally just bite at us, usually legs. I'd say this doesn't come out of the blue, he might be excited to see someone for example. I'd say his body language isn't aggressive, there's no baring of teeth for example, but as someone who is relatively inexperienced with dogs, how do I know what is beyond just being a puppy?
He's due to start puppy training - unfortunately classes had to be delayed as they are outdoors and the field was flooded - so should we just wait and see whether he improves overall?