Ya, it's the dang prednisone. 100mg a day is a large dose. The inappropriate peeing should stop as she's weaned off the pred. She really can't help herself. Just invest in a large jug of a good enzymatic cleaner formulated for neutralizing urine odors and maybe get some pee-resistant pads for any furniture she may be used to lying on.
So glad she's home and eating!!
I wonder if she just doesn't like the Medi-Cal Recovery food and that's why she wouldn't eat it at the clinic? I take it that she's eating her regular food now? Frankly, if that's the case, I'd call the clinic and ask if it would be okay if you returned the canned food and let her go back on her regular diet.