I am sorry you have waited so long for an answer. I am a veterinarian, and will do my best to help. I apologize; I did not seen your question earlier. I hope I can still be of help. I am sorry to hear you are worried about Boss.
The lining of the bladder has mucous glands, which always produce small amounts of mucus. When stones are in the bladder, more mucus is produced, to protect the bladder lining from being irritated by the stones. Once you treat for the bladder stones, the mucus will resolve on its own.
There are diets that are designed to dissolve struvite stones, and I always try them before doing surgery. Royal Canin Urinary SO diet, and Hill's CD and SD diets are the ones I have used.
If a urine culture has not been done, I would consider doing one to check for infection which often occurs with stones.
Your blood tests look good. These are the asterisked ones:
CREA is creatinine, an indication of kidney function. Since 1.2 is normal, 1.3 is pretty close to normal. Since the other kidney value (UREA) is normal, I am not too worried. If a urinalysis shows good urine concentration and no protein in the urine I would monitor this and if it continues to rise I would start to worry about her kidney function.
HCT, hematocrit, is one measure of red blood cells and it is .6 higher than normal. This probably indicates mild dehydration. She is definitely not anemic since it is high, and that is good. If there were a problem with kidney function, she might be anemic (low red blood cells).
MCV is the average size of the red blood cells and hers are a little larger than normal. This may indicate her bone
marrow is over active, and pushing out extra red blood cells (new, freshly made red blood cells are a little larger than one already in circulation). Not something I would be too worried about; could be normal for her. All these "normal" values are a "bell shaped curve" and there will always be some individuals that are outide the curve.
MCHC is the average amount of hemoglobin in a red blood cell, and hers is a little low but only .6 low. Not too worrying to me. SInce her MCH is normal and these two are similar, I note it but don't think anything needs to be treated.
PLT is low, that is her platelet (clotting cell) count. Platelets naturally stick together, and can be hard to count. Usually there is a comment on the report, something like a technologist review of the slide reveals normal platelet numbers. If I get a low platelet count and there is no comment like this, I ask the lab to do that before worrying that the actual platelet numbers are low.
None of these have anything to do with the bladder stones, and actually none would concern me very much if this were my own dog. The "abnormals" are so close to normal that they don't worry me. I might recheck the CREA in a couple weeks, and be concerned if it were going up. I would concentrate on getting the stones to dissolve and see how the numbers look after that.
Please let me know what else I can answer or help with. I will be online an hour or so and then have to go to work at my clinic and will be back online later.