Surprisingly Aggressive Behavior by Older Kitten Towards New Kitten

"Jonny R" wrote in message
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"Karen" wrote in message
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Report back same time next week. I bet you have two cats that at least
tolerate each other by then

Actually things are already going much better. Last night we were in
the basement with Normy (the younger kitten) watching TV with him on
the couch, and Hummy suddenly walked downstairs and after a few
minutes spotted Normy on the couch, but didn't hiss or anything.
After about 2 minutes he quickly ran up to Normy, sniffed his butt and
ran 5 feet away. But he didn't hiss, growl, or look aggressive. This
got Normy curious who then jumped off the couch and slowly walked
towards Hummy (while we watched on cautiously). They both approached
each other carefully and kind of circled around one another a bit,
getting closer then jumping away. Then finally to my surprise I saw
Hummy (the older cat) flop down to his side and shaking his paws at
Normy, looking to play. To our delight both cats then played together
for about 15 minutes. There were a couple of occasions where Hummy
got a little rough and Normy made a small noise, but nothing bad.
However after about 15 minutes it looked like Normy didn't want to
play anymore and walked away, and Hummy suddenly got upset (perhaps
because he still wanted to play) and started growling. He then spent
about 3 minutes somewhat chasing Normy around and biting him (not
hard, but not gently either) so that's when we decided to intervene
and separated the two, and kept them separated over night.

As of this morning Hummy growled at Normy a little, but nothing too
bad.

On a separate note though, we are taking Normy to the vet today
because this morning he went to the litter box 4-5 times within a 3
hour time span and had very liquid poo, that had traces of blood on
the surface. We are not sure what this is about (he still looks and
acts normal). He did get neutered about 8 days ago, so I'm not sure
if this is a result of that. But we aren't taking any chances so he's
going to the vet.

May be a little stressed. Ask the vet for some Feliway or stop at the local
pet store. It may also help introductions go better. Keep us posted