Ok, I had this nightmare last night at it really freaked me out.

In my nightmare my family and I had just got a bunch of these kittens, some of them were disabled as well and we were trying to help them. We were playing with them and watching them and then my mom got up and had to go outside. When she opened the door this animal, which looked like a mix between a cheetah and a panther cub with an odd mark on his face came inside. For some reason, we decided we would let it stay inside for a little while, I guess maybe we thought it was cute. It lied down for a minute and then extremely quickly got up, grabbed one of the kittens (And it said something like "come here!" or "get over here!") and proceeded to grab it's body between it's paws. Then it took part of the kittens head in it's mouth and started breaking the kittens neck. I was automatically horrified so I tried to grab the...thing. I was laying on the floor next to it but when I grabbed it, it's fur ripped off, showing it's bare skin, and then when I tried to go closer it started moving farther away and I (for some reason) couldn't get up. All I kept hearing was this cracking over and over again, and I could do nothing to stop it.

Could you please help me figure out what this dream/nightmare means?

It sounds like maybe your unconscious is trying to warn you that someone who looks innocent shouldn't be trusted.