Vladimir Markov had twenty four hunting dogs killed by a lone Amur tiger. And the Bengal tiger has fought off and killed twenty to thirty dholes. Five dogs aren't doing nothing.
The tiger would probably lose some fur but there would be 5 dead dogs pretty quickly. I doubt it would last 2 minutes if the dogs were crazy enough to get close enough to bite it.
The five German shepherds would tear the tiger apart because of their speed and numbers.
Saddening thought since they're critically endangered