I've twice killed large cats that looked like bobcats or half-bobcats/half house cat if that is possible. First was 40 yrs ago. Last one was 3 yrs ago within 1/4 mile of first one. It ran up a tree fast as anything I've seen. Dog was baying like crazy and I raised up and shot it out of tree. We weren't sure what had been killed. Have seen picture of a Manx cat and it looked similar to that. Sorry I can't tell you anything else for certain about it.