When my five month old kitten takes the metro he becomes life less, sits around staring, won't eat. He falls asleep with eyes open, third eyelid showing and only for 30 minutes at a time. He doesn't purr and can't find a comfy spot. The only time he becomes active again is when it is an hour before his next dose. He will start playing and eating again. When we try to administer the medicine he begins to growl aggressively and hide from us. Our vet wants us to continue the medicine and also give him prednisolone .5ml. I wanted to know if this was a normal reaction to the medicine?