My dog attacked our cat

Unfortunately last weekend as I went to let my dog out from the house at 5:30am in the morning the cat was right there and before ai seen the cat the door was already open. The cat ran and my dog chased at the same time. She ran up the fence however slipped down to my dog. At this point my dog Yoda had lock jawed on the poor cats jaw? I was screaming for my dog to let go and trying to pull him off.. at this point my partner come out trying to get Yoda off but he was not letting go

Your dog isn't 'dangerous', but must be taught a strong 'leave' command.

Many dogs will chase & grab on the spur of the moment, it's their nature, but you need to be able to call him back or at least let go on command.