Update on Grep, post vet-visit:
Grep is a reluctant eater because he has ulcers on his tongue ): We know he's hungry cos he keeps leaning down to smell the food, but the whole food in mouth thing isn't particularly happening.
To this part, we've been given more things to medicate, a syringe to get some food down, and some other things to try. We were also given the option to leave Grep overnight for observation, but since Decay is at home today (he's got a cold too ...) home today is ok.
Decay and Grep are home now, and Grep has managed to eat something with the help of Decay and a syringe. He has also decided that he would like to try eating from his bowl ... so Pixel is being kept away from Grep's food supply, in an attempt to get some food down.