The milk Thistle seed extract you have is twice the potency for the dose. To dilute it use purified water, as tap contains chlorine. Use no more than 1/32 Tsp. to add a single needle drop of this source to; then stir it in a small plastic container. From there pull up the entire amount, but only push out a quarter of the amount into the low fat yogurt. If you squirrel hasn't lost too much weight the get the low fat plain yogurt from "Stonyfield" if available instead. If this source isn't available be sure you still get organic, no sugars added, no fruit in the bottom as it is high in sugars, nor artificial sugars which are the worst of all as they are highly acidic.
Not sure if you can get Stonyfield low fat plain organic yogurt that is very low in sugars, with no sugars or artificial sugars added, the latter of which is toxic and will increase diabetes as it is also highly acidic. To enhance the flavor you can add one drop of organic vanilla extract per yogurt feeding that is per meal. If you don't have this yogurt available where you are, let me know what low fat plain yogurt preferably organic, you do have.
https://www.stonyfield.com/products/...fat-plain-32oz
https://www.amazon.com/Simply-Organi.../dp/B0002UN7PI
Diabetes is caused by a diet that is highly acidic promoted by too high fats, protein, carbs from acidic sources like nuts, seeds; but also from sweetened foods, fried foods, and highly process foods that should not be fed to tree squirrels. Nuts can be fed limitedly when there is no MBD, or diabetes when concurrently feeding a block diet.
To determine the ph. of the diet, taking a set of threee readings at least 1 hour after meals. Then the next day take one reading prior to the first meal of the next day; best from the first urine of the day. Then add up the reading values and divide by the number of readings that is four to get the mean urine (ph.) for the diet.
The normal mean urine ph. range is 6.0 t 6.9 preferably 6.4 to 6.9. Abnormal is anything below or above this range. Lowering nuts and removing all seeds while increasing tree fruits in the diet is needful. Do not feed any sources with sugar or salt added, only naturally occurring sugars as is found in unsweetened plain organic yogurt.
Do you have testing strips, if not you can get a bottle of them from UK Amazon.com, and perhaps at local drug store. Getting the multi test strips would be advantageous with having a squirrel in any case. There are those here that can help interpret the readings if you post them here.
If the urine is alkaline that would indicate with diabetes that there is also an infection. This is commonly seen with UTI, but can also be from Kidney infection from kidney stones. Without an x-ray it is hard to say save urination is fitful or strained to do.
Catching the urine can be tricky, so if there is a corner your squirrel pees in put some wax paper to collect it. Be sure you do the test immediately not waiting for when the urine cools it will increase in bacteria and change ph. It is the sugars in dairy and grains and potatoes and yams that support too high phosphorus in the diet, and too many nuts and seeds that support too high fats.
If you are present feeding potatoes of any kind including sweet potatoes or yams stop doing so and change to organic baked winter squash instead. Acorn or Butternut squash, even pumpkin will do, that you want to fully bake, cool sufficiently and emove the seeds and mash before feeding the flesh. You will want to store it once baked and cooled in the freezer; putting a measure portion into the dimples of a silicone ice baby food tray is ideal, as then you can pop one out and put the rest back into the freezer. With one portion should be at least 1 Tsp. of the baked squash; place it into the refrigerator overnight to thaw, then take it out in the morning prior to feeding to warm up a bit more, but d not microwave it. Use have the amount to feed AM and then again PM.
Calcium citrate is a source I recommend for metabolic disorders including MBD and diabetes. Why is for reason that with a diet high in acidity ph. below 6.0 which promotes diabetes, also promotes calcium oxalate kidney stones. Also it can promote bladder sludge. UTI also are promoted by a diet that produces acidic urine. Both are highly problematic when it comes to supporting long term health it is needful to prevent these conditions from occurring by supporting a diet that promotes mid 6 mean urine ph.
Please understand without a history that can take many posts, I want to give you here what you need to support turning this condition around if at all possible. Just being thorough as I can as to not forget anything. If you have more questions please ask them here save it is something you don't wanted publically posted. In that case let me know here and I will send you a PM so you can share what you desire off the open board.
I will fill you in more on the rest of the diet when I hear back what you are presently feeding. Take care, DF