An airpipe is a pipe or tube through which air flows.
It can depends on how much you have smoked but cannabis usually stays in the body for about 12 hours and the breakdown products can usually be detected for 36 hours after. The tar that goes into the lungs can take a few days to dissipate and the damaged cilia hairs in your airpipe can also take a few days to repair.
Watery eyes and wheezing is usually caused by a upper respiratory infection. Any signs of respiratory problems (wheezing or panting) will require a vet examination. Make a appointment at your Vet and have your dog examined. Infections do not disappear on there own. == == your dog could be suffereing from allergies or it could be a medical condition. if your not sure you should consult your vetenarian.