3 of my dogs caught either kennel cough or a respiratory infection a fortnight ago. I've isolated them from the pack etc, disinfected the van on several occasions. Then at the tail end of last week another 2 dogs from my pack has had it. I've did the same thing again. I've managed to keep it on my morning walk and haven't mixed any of the dogs between different runs. I've informed all my clients so they are aware there is a risk involved at the moment. I've spoken to a local vet to gain advice and followed it vigorously. Any other advice is appreciated.