Hello I am Dr. Joey. Thanks for trusting me to help you and your pet today. I am a licensed veterinarian with over 16 years of experience. I look forward to working with you.
This poor little guy! My top concern would be he has an intestinal parasite that is causing some irritation when he defecates. This is something I recommend we not have you try to treat over-the-counter, though. Some of our OTC dewormer cans actually worsen the problem. So, not a good idea.
His veterinarian really should do a stool check and find out if this is the case and then get you the appropriate, effective and properly dosed treatment (so don't forget to take a stool check in when you have him seen this week; perhaps tomorrow?). In the meantime, it might help him if we try to slightly increase the water content in his diet (make his stool moister so it might be easier to pass). Continue feeding canned food until he is seen would be an excellent first step. A smidge of canned pumpkin mixed in there may also help him to pass stool normally or at least more comfortably (maybe 1/8 to 1/4 tsp with each meal).
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