Most likely the cause for the odd differential values (platelets and monocytes) was lab error. Cats, especially sick cats, clump platelets like crazy and if you run the sample through a hematology analyzer you can get some odd results. We always check a blood smear and do a platelet estimate if we get abnormals like that- also to look for blood-born parasites. I suspect the monocyte count was a similar problem. Most send out veterinary labs will also verify any abnormals by a blood smear. If the blood was at all clotted when analyzed (by machine or by hand) then the platelet count will also be decreased. OTOH, she could have had some sort of thrombocytopenia that resolved quickly- it only takes a couple of days to regenerate platelets.

It is suspected that cats suffer more from chronic pancreatitis which causes waxing and waning symptoms. It apparently isn't always as acute as with dogs. But I've certainly seen some very sick cats with chronic pancreatitis!

Glad your Peachy is feeling better and I hope she continues to recover completely.

Thank you so much Meghane for shedding some extra light on this platelet question. I had hoped you would still be 'around'--I haven't been much on the forum in the last few months.
Now I just have to keep reading about what causes pancreatitis in an otherwise, (at least seemingly) healthy cat, and how it can flare up.
Vet suspects: 1. 'stress', and, unfortunately, she has had plenty of that with our 2 additions from 18 months ago that she has not accepted...

2. change of diet-- from Science Diet (dry) to Evo (dry)-- a very, very slow change (over 4 months). Interestingly enough, Peachy has spontaneously returned to Sc. Diet!!!!
   Thanks again,
   Anne-Marie

So sorry to hear about Peaches...but, happy to hear that she has improved.

Keep an eye on it, though. My 15 year old Siamese has Diabetes and newly diagnosed Pancreatitis. It is really scary. It comes and goes and he gets sick so quickly. I'm still trying to learn everything I can about Pancreatitis and treatment.

Right now, we're hoping that the diabetes will subside once (if...) the pancreatitis is controlled. He's on Pred, B12, Metronodazole and injectable antibiotic twice a month.

The Metronodazole is the worst to administer due to the drooling and my cat acting like I'm torturing him. I use a liquid tuna formula, but it's still difficult. I have one chance before he runs away from me and hides. Ugh!