Dog Poop Covered In Mucus Help W/ Dog’s Chronic Diarrhea?

Help w/ dog's chronic diarrhea? - dog poop covered in mucus

Mutt 7 years, ate sweet potatoes and well-being of whitefish 5 months w / out issues. Eat 2x per day, has no appetite, is lethargic. Take medication for allergies (Hydroxizine) 2x a day in banana. 2 slices of banana r only food extra. Stopped medication for allergies, but the diarrhea persists and allergies flare up when it is restarted. He tried, white rice, but the diarrhea remains undigested w / Rice visible. Drink water regularly.
After 2 weeks diarrhea, which is more fluid, and accidents in the house. Evacuations were sometimes covered with white streaks of mucus and blood. @ 4 Worms Veterinary negative results (through the stool sample), received a 10-day treatment of metronidazole 2 Promotion of shit fixed or giardia treatment possible. After 7 days no improvement, said veterinary prescription strongest med 4ication. The next day began with shit sound and stronger than ever with drugs.
Now 2 weeks after medication, the diarrhea is back, and yesterday shit was covered with black slime.
Can you spend more time at home alone, because @ ba? Suggestions?