about 3 times a year, my cat gets a nasty hairball, the same thing always
happens:
I wake up to a nasty pile of cat puke with a lump of hair in it the
size of a cat turd, at this point I give him a bit of the furball treatment
"lube" in a tube and some food in a clean bowl.
kitty ends up going in and out of the catbox every 10 minutes trying to
take a crap, eventually he does, but he keeps going back in there and tries..
after going in there about 20-30 times he strains so hard that he pisses out
1 or 2 drops of pink pee (bloody??) sometimes he does this on the bed.
this goes on for about the next 12 hours, until he craps again, passing
a bit of hair along with his crap.

I realize that the furball probably upsets his digestive tract to the
point where he thinks he has to go to the bathroom all the time until
it passes through him.  my vet says this is all normal, try to brush
him more often and give him the digestive "lube" stuff.  I'm just
concerned about one thing (he says not to worry, but I figure I'd ask
actual cat owners also), when he strains so hard that a drop of blooddy
pee comes out, is this serious?  Although kitty gets over it and is 100%
back to normal after passing the rest of the furball within about 12 hours,
the vet says not to worry but I've got a gut feeling that it can't be very
well, or happy for kitty.  Is there anything else I could do, like give him
a suppository to make him pass it faster?

thanks