Good Morning and welcome! I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
From what you have described, Jax is suffering from a mild digestive disturbance caused possibly by something that he may have ingested. The blood you see is not serious because this soft stool causes irritation to the very sensitive rectal mucosa which , in turn , causes small blood vessels to break and bleed. Once the disturbance is resolved, this will resolve on its own.
For this, follow these instructions:
Fast Jax for 12-24 hrs to allow the digestive tract to calm down and heal.
Give him Pepcid AC or Famotidine at 0.5 mg per pound every 8 hrs. That can be purchased over the counter at the pharmacy.
Give only small amounts of water during the fast or ice cubes
After the fast, feed rice and boiled chicken (2/1)
If the diarrhea has resolved, then wean Jax back onto regular food. If the this persists especially during the fast, take your sweet Jax to your vet for an exam and lab work and a fecal exam to determine the cause for this. This is extremely important since this can cause dehydration or other more serious concerns.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please REPLY so I can clarify for you.
Sincerely, ***** *****