just got back from the vets the cause of these infections are the same but for different reasons ,as the fist dog had a foreign object in between the toes the second dog lost her drew claw a few days ago and it was bleeding since then i have let both of them swim in the floods in the feild where i run them ,They both got infected in that flood water via there injurys ! there is allso houses that have there soak-a-ways in that feild where the flood water is ,so theres sewage runing in that flood water as well this is what me and the vet seem to thinK