This is a strange one to ask but here goes.
My sister in law has 3 dogs (2 German Shepherds and a labrador), 6 cats, some ducks and chickens.
The 2 German shepherds have grown up with the cats since they were puppies and all have lived happily together for a couple of years with the only problem being the bitch dog has killed a couple of chickens until last night when the wife got a call from her distraught sister to say her other half had just let the dogs out in the garden for a pee and both of the German shepherds had attacked and unfortunately killed one of the cats, obviously the cat didn't do a runner when the dogs came out as they normally get on and play together.
So the question is why would the dogs do this and are they likely to do it again?
The sister in law wants the dogs gone as she also looks after her 2yr old grandson quite often and is worried that they could turn on the child or the other cats.
Any advice appreciated