Chloe has behaved quite strangely today...well, not exactly strange, sort of all the norty side of her behaviour exagerated! She's not responded to commands she was previously ok at; she's hasn't slept a wink (occasionally lay down, but still obviously alert). She's followed me about the house constantly; she's barked at absolutely nothing for ages; she turned her nose up at her tea (although finally ate it). She just seems to have been generally agitated. I wondered if she just is starting to need more in the way of stimulus. Today she had 35 minutes off lead, constantly retrieving ball and also working on recall and sit and stay. Since then, we've had about 10 minute interactive play and I attempted a clicker session with her this afternoon, usually she loves it, but she got fed up after 2 sits, 2 downs and 2 leaves

I'm not worried, she's wagging her tail almost constantly, but I wish I understood doggy behaviour a bit better! She's presently lying down on the floor (really odd...usually its the sofa!) but at least she's settled. I usually take her out for a walk between 9 and 10, now Im not sure whether to let sleepingish dogs lie
Could it be a sign of her coming into season? Or the start of the dreaded teens? Or am I just being paranoid?