open sores on frogs legs/ pond advice

[Jacobsherps]

guys i need at least something. i dont know what to do at all and im scared i can accidently contaminate my pet frogs and my bearded dragons wich can get this aparently

[Jacobsherps]

one of the frogs has died now do to the disease. is there any thing i can do to help the other two. also any clues to why none of the first and second year frogs are compleatly fine. like nothing there all nice and healthy and are getting much more food than they would ussually get because all the larger frogs are no longer eating. also we want to have amphibians breeding in our pond especially american toads and tiger salamanders and green frogs. probally no salamanders though becasue no one has seen one of those in the neigborhood for years. will it be safe to go out to my local lake and get 2 new adult green frogs to breed in my pond asuming that my two frogs will die bc they probally will sadley