I just noticed a little blood in my cat's stools again. I had started him on a little Purina Sensitve Stomach (non grain-free) dry food 5 days ago. I wonder why this cat can not tolerate any dry food. I give him a daily mixture of 1 1/2 cans of canned food plus added water and dry kibble. Every 2-3 days I add 5 drops of fish oil to this mixture. Any ideas what is causing the bleeding? His stools never look moist enough. They are like a thick,dry putty consistency. He has been passing a lot of hair in his stools. Can a bulid up of hair in the intestinal tract cause small pebble like,dry stools? Can a build up of hair cause blood in stools? His stools have had traces of blood on and off for 4 months...every time I give him any kind of dry food along with his canned food. However he never has any blood in his stoools when he eats 100% canned food. The Vet has not found anything wrong with his last fecal test except coccidiosis 3+ which was totally shocking since he has never had any loose stools! He finished the Sulfa drug over 10 days ago. I took him him on Monday,3 days ago and the Vet said he no longer has a coccidiosis problem. Has anybody else had a cat that bled whenever it was fed any dry food?