Plain baby food – either chicken or turkey – is bland and Izzy could probably handle it. I wouldn’t mix it with rice, however, as rice is known to deplete taurine, and cats can’t begin to digest it.
Or maybe Izzy could eat other more bland foods, such as Before Grain 96% chicken, turkey, or quail & chicken. They are a high quality canned cat food – much better than what most vets prescibe/sell.
Try keeping her on the probiotic for a while, personally I prefer to not use FortiFlora (ingredients that I don’t like) but use Holistic Select probiotics instead. Those can typically be easily found, just sprinkle a tiny bit on the food, like it is “salt & pepper”, not the amount the bottle says! Keep up with that for a few weeks to help replace/replenish all the good bacteria that the antibiotics killed off.
I had a cat with chronic diarrhea issues, here is her story and what helped:
Wilda, one of my foster cats, had diarrhea worse than any of my others. She had diarrhea most of her life, and is nearly nine years old. It was caused by an intolerance towards the food she was eating at the shelter – mostly Kirkland (dry) and Taste of the Wild (dry). Eventually they isolated her and fed her Hills Prescription i/d and z/d – both at different times and for several weeks – with no change. She was then put on long rounds of antibiotics and dewormers, again not helping her problem, but instead aggravating it even more.
Once she was in my care, I took her off of the antibiotics and dewormer, as well as taking away any dry food. She was an easy cat to switch over to canned food, though she did go through a “carb withdrawal†for about a week. Dry food is full of carbs, and that can be addicting to cats. The canned I was feeding her, “Before Grain 96%†was very low in carbs – so it was a hard switch for her. I also started her on probiotics to help replace the good bacteria that the antibiotics had killed off. She also was started on B12: something considered essential for cats with issues such as diarrhea. She still had issues with diarrhea – canned food wasn’t cutting it for her. I was hoping a high quality, low carb, grain free canned was all she needed, as it would be easier for her future adopters to feed. It wasn’t enough though, so I started transitioning her to a prey model raw diet.
Her raw food was cut up into pencil eraser tip size pieces to make it easier for her to eat. She had no jaw strength, and actually is also missing several teeth. Slowly I switched her from all canned to all raw, and then I started to see the results I wanted. Normal raw fed cat stools – smell free, and only passing a small stool once every 2 to 3 days. That was a huge difference; for once I could clean her litter box without wondering if I should be wearing a hazmat suit 😉
http://catcentric.org/raw-feeding/ http://rawfedcats.org/practicalguide.htm and http://ibdkitties.net/rawinstructions.html are good guides about raw feeding. You can either prepare it yourself (I do that way) or there are a number of premade brands available. “Rad Cat” is the best brand I have found so far – stores that carry it do typically have free one ounce samples to try out so you know if the cat likes it or not. Nature’s Variety is another one, but it should be fed along with another brand, as their food is to high in bone and can be constipating. Nature’s Variety also has a coupon for a free sample, I’ll try find it if you are interested.