I spend the money and get the shot, but it is expensive. You can crush the pill and put it in tuna juice or other meat juice. Make sure gravy has no spices. Broth is better. Some cats have problems with spices. Or get a syringe and be prepared for a battle. Make sure she'll drink the broth first before lacing with meds.
If she's your only cat, you can also crush and sprinkle on food.
These are tactics that I have tried. Mixing with gravy broth works for me.
Good luck
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