4 week old kitten with diarrhea

Hi guys! Hope you can help!!!

I have a rescued 3 week / 6 day old kitten (will be 4 weeks tomorrow). I have been bottle feeding from day 2.

Back story – our outside mamma cat had kittens on a Sunday evening. I found them shortly after she had them, in a box of vases. 3 had fallen down beside the vases and she couldn’t get to them. 2 of those were slightly cool to touch. I warmed all 4 kittens up under an animal heat lamp and gentle massaging. Put all 4 kittens in a new empty box with towels and mamma.

The next morning, there were only 3 kittens in the box. She had carried one away back to the box where she birthed. Kitty was very, very cold and stiff. I warmed him, massaged him, blew in face, etc, until he started moving some finally on his own. My fiancé swore he was a gonner, but I saved him :). Started that day feeding premixed liquid kitten formula out of an eye dropper. Was able to transition to bottle during week 2. He has done tremendously well!!!!

At week 3 (last week end) he got constipated, was 5 days. I had switched over to the powder formula, and I think the switch is maybe what constipated him. I gave him just 2-3 drops of mineral oil and he finally had a bowel movement, and it was very hard for him to pass when he finally went. Had normal bowel movements this past week.

So now to this weekend. Last night, he started in with diarrhea. By today, it has changed to very watery, greenish in color, small cottage cheese clumps at times (maybe unprocessed formula), straining very hard toward the end of the bowel movement and blood at end of bowel movement. No vets are open. Today I have been mixing the powder formula as directed, adding the same amount of premix, and then using about 40cc formula and 15cc pedialyte.

I am going to the store as soon as I get off work and get some baby powdered rice, plain yogurt, goats milk, and some Kaolin Pectin to help with the diarrhea. Our plan is to take him to the vet on Monday.

So…….

How much yogurt do I use? I found a recipe for homemade formula 10 oz goats milk, 1 egg yolk, 1 cup plain yogurt, 1 tsp light kayro syrup. Should I use this in place of the actual kitten formula?
Or should I mix yogurt and baby powdered rice to the kitten formula?

I’m at a total loss. I’m a nurse for humans, not animals… lol