When one of Nick's old friends, Mariano Montoya, comes through town on his way to sell his cattle, trouble hits in the form of deadly anthrax. The man's cattle begin to die off and it seems as though they will have to shoot them all, killing as well Mariano's dreams for the money. Until Eugene tells them of something called immunization, which he believes will work. Mariano isn't so sure however and tells them that to prove it works, the Barkleys must first try it on their own prize bull!The bull collapses and it looks as though it has been killed but then it moves and gets up, it works!! Mariano's herd is saved!

Lorsque l'un des vieux amis de Nick, Mariano Montoya, traverse la ville pour vendre son bétail, des problèmes surviennent sous la forme d'un anthrax mortel. Le bétail de l'homme commence à mourir et il semble qu'ils devront tous les abattre, tuant ainsi les rêves de Mariano pour l'argent. Jusqu'à ce qu'Eugene leur parle de quelque chose appelé immunisation, qui, selon lui, fonctionnera. Mariano n'est cependant pas si sûr et leur dit que pour prouver que cela fonctionne, les Barkley doivent d'abord l'essayer sur leur propre taureau de prix ! Le taureau s'effondre et on dirait qu'il a été tué, mais ensuite il bouge et se relève, ça marche !! Le troupeau de Mariano est sauvé !

Nella California di fine 800 Victoria Barkley gestisce un grande ranch e si prende cura dei suoi cinque figli. Epopea western e saga famigliare in una delle grandi serie tv americane... Con Richard Long, Peter Breck, Lee Majors, Linda Evans, Barbara Stanwyck Manano Montoya, vicino di fattoria dei Barkley, ha una mandria affetta da carbonchio, che potrebbe salvare con un vaccino ancora non testato su animali... Con Richard Long, Peter Breck, Lee Majors, Linda Evans, Barbara Stanwyck Episodio