Pepper is 4, 24 lbs. We've been doing ~3 km in the evening when it's cooler (Portland). She used to recover in 10 min; now she's still panting heavy 25–30 min after, sometimes with noise.
No blue gums, appetite fine. It got warm early this week (high 70s) but this started before that.
Cut distance in half and see? Or vet same-week? I don't want to be paranoid but I also don't want to "wait and see" on breathing.
