This is from the email I sent to my friends: 

Yesterday (Oct 06) in the morning time we saw that he was a bit weak
and sometimes spacing out, somewhat not happy and he was moving a bit
slow motion. He was also spending some more time in his litter box
than normal. He was going in and out of the litter box, etc…

We thought that he was still not happy because I was out for the last
3 weeks. Then I went to work and came back, he was chilling in the
middle of my bedroom and he looked like he wasn`t paying attention to
whatever I say. I tried to play with him and he actually played with
me some time. So I thought he was fine.

I went out again and came back few hours later. We found him throwing
up in my room. After cleaning the mess, we saw that he looked like he
had some pain around the stomach area so we thought that he had an
upset stomach. We gave him some grass and he literally ate them all!
Then he threw up again, this time we saw a pinkish, reddish liquid
coming from his stomach. We feared that it was blood so around 12am,
we decided to take him to pet hospital emergency.

We took him to South Paws Animal hospital in Fairfax, the doctor
decided that he had clogging in his urinary system, and he basically
couldn`t pee She said that this is somewhat a common problem for
the male cats. To get a second opinion we drove to Alexandria
Veterinary Emergency Service, and the doctor there said the same
thing, but charged us almost twice So we took him back to South
Paws around 4 am.

As a result: They put a urinary catheter to flush out his bladder
which is going to stay on him for 12/24 hours. They also sedated/put
him to sleep during this. They are also going to make urine and blood
analysis to find out if this is caused by  urine crystalization or
other stuff… They will also observe him another 12 hours to make
sure that he can pee all by himself after they removed the catheter.
We expect him to be at home Sunday around 6-7 PM the best case
scenario.

I`ll visit him today, and try to get some pics. I will share it with you.

Just wanted to let you Zipir lovers know.