Kitten bleeding from bottom

My little 9 week old kitten Jazz is mad, he is running around, eating wet food fine and seems normal. He went to the toilet (for a number 2) a day and a half ago and i noticed there was a bit of blood that followed after. Since then he has not gone for a poo. Do you think this is constipation? and the blood was from straining to hard? I read giving them a bit of cod liver oil in their food would help from constipation is this right? Advice needed!!!! Cheers

P.S. He has been wormed.

[Jim Humphries, B.S., D.V.M.]

Could be a bit of constipation.  Make sure he is drinking enough water.  If this goes too long can be serious and a vet exam would be needed.  

Let us know how he is doing now.