Not using the litter box

Question
Hello there
I have 4 pedigree Persian cats currently . two girls and two boys . only one of my girls is spayed , and the other three cats are not neutered . actually my problem is with one of my tomcats , which is really bothering us .
you see , he's a 2 and half year male Persian , and i bough him when he was just 40 days old . he has always been a fantastic tomcat with a nice manner and good attitudes. he dies mate with several female Persians regularly including my own female cat and other Persian queens that the vet refers to me . he's the proud father of dozens of cute kittens . but I don't know what is wrong with him , since last few months , he has refused to use the litter box , and he rather our beds , blankets and sheets for peeing ! I've 4 cats and the other 3 are so careful about all this , as they have never done something same . but Bijou is just turning so irritating . at first situation was not as awful as it is just now . he used to pee on beds just once or twice a month or something . but since last few couples of weeks , he has decided not to use the litter box at all! just beds and blankets ! even yesterday he attempted to poop over there! that's terrible !
I must add that he and other cats are entitled to use our privet yard in some certain hours each day . when he's in yard , he does his job over there which is OK with us, but when he's indoor he prefers the beds .
we are absolutely angry at him . we always keep the litter box clean and change the sand regularly . we use the special product for cat's litter box for our babies , so we're just wondering what is the problem . we tell him off , shouted at him even try to kick on him immediately after peeing on beds in order to convince him that this is not right ,but it seems that he simply does not care .
can you please help us ? we will have no choice but giving him up if we can't cure him . he does not any problem with any other cat in the house . even he's friendly with the other tomcat though he is mature and tends to mate too.
please give us any possible advice
Sorry for any possible mistake in my English
Soheil from Iran .

Answer
Soheil,

Please do not punish him! When a cat pees on your bed or elsewhere he is telling you that something is wrong medically and he can't help it, or that he is very upset about something.

The poor kitty may have a urinary tract infection or urinary crystals. They are painful and cats associate that pain with the litterbox and go elsewhere. If it IS crystals, it can cause a blockage. If not treated in time it is always fatal in male cats. So you may want to take him to the vet for a test for infection or crystals, and also test his kidney function.

Has there been any changes in your home for the cat to be upset? Any new people move in or out? Any new pets? Any new tomcats in the neighborhood? Did something scare him when he was using the litterbox where he is scared to use it again? Sometimes you have to be a detective to find out the problem.

I do not answer questions about pedigree cats or breeding. You may also want to ask an expert under the heading of BREEDING AND SHOWING under the general heading of CATS. They would have information more info about the Persian breed and if it has to do with him being a tomcat.

But first I would have him checked by a vet to rule out a medical problem that needs to be treated.

PS: Your English is very good!

Tabbi