hi i have 2 rir ive had them for two and a half weeks..and they have just started to lay.. could any body help me with what vaccines i need to get them for, worms ,,salmonela,ticks ,mites,or any thing else,,that a chicken gets.,some body told me that putting a few drops of tcp (disinfectant) in there water once every couple of weeks helps against salmonela, is this true?,or is that a load of old rubbish,any hints tips on keeping my hens healthy will be appreciated,,i also have 3 leghorn eggs in the incubater.!!!