I don't think my water bottle for my ginuea pig is working. The old one I use to have was obviously working as it dripped and I could physically see it being depleted. But this one doesn't drip and it's seems like it's not working cuz my ginuea pig is sucking it and it seems like nothing is coming out although it does say no drip nozzle so maybe it is. So I'm just asking are they supposed to do that or is this one defective