Really helpful guide. I actually went through something similar with my Labrador pup—he suddenly started heavy breathing and I panicked thinking it was serious. Turned out it was early kennel cough and we caught it just in time because we noticed the signs you mentioned like coughing and fatigue.
Since then I’ve been extra careful about where I get my dogs from and how they’re raised early on. I came across coloradosfinestsportingdogs.com while looking into responsible breeders, and I liked how they focus on healthy, well-socialized puppies raised with strong genetics and good temperaments—honestly, that kind of start makes a big difference in overall health and even breathing-related resilience later on.
Definitely agree with the post—early action and awareness can literally save a dog’s life.