I am beside myself and not sure what to do next. I came home today to find one of my cats dead. Shaggy was 10 years old, has been blind most of his life and my german shepherd, Otis, was raised with Shaggy and his brother from the time we adopted him at 8 weeks old. There were no real issues between these two before last year when Shaggy swiped and made contact with Otis after Otis started nosing him. The end result was that cat's rib was broken, I imagine from Otis picking him up and thrashing him. The cat healed and we started working with a trainer, and things got better. They stayed away from each other and things were ok. Recently, though, I've noticed Otis starting to nose Shaggy again while he was in his basket, but nothing major so I started reinforcing the 'leave it' command again. What I saw after realized what happened was horrific- there was fur everywhere, the cat had urinated (i'm sure in fear) all over the place (from fear, I'm sure), there was a small amount of blood along one wall. And the cat was drenched- i'm not sure how or why (saliva?). I'm just so sad and angry and disappointed...but also scared. Our other cat who isn't blind always kept his distance from Otis (but then again, he could see where otis was) And now we also have toddler grandkids that visit us. I'm worried about some kind of recently heightened prey drive?. Is he now considered aggressive? Is he unsafe? Any idea what might have caused him to lose his mind?? Its as if something snapped. Do we try meds? Rehome to a catless, kidless home? Will he do this again? I was so angry with him, I sent him downstairs and on his own, went into his crate and stayed there with the door open (he NEVER does that). So many thoughts, sorry if this is scattered. Is it possible he felt remorse for killing the cat he's known his whole life? He is slinking around with his ears down...or is that a response to my being upset? Calling our vet in the morning. As mad as I am, I can't imagine getting rid of him. I feel that would be the wrong move- I love this dog and I feel it would be unfair to him. But, I just can't believe this has happened. Thanks for any advice or feedback.