I ordered (by mistake) a five-pound bag of sweet whey, and didn't
discover it until I opened it.  As soon as I did, though, Pi showed a
marked interest.  So I put a teaspoonful or so into his dish, and he
licked it up.

This is so unusual - Pi usually won't eat anything but cat food and
peanut butter, and tuna water.  He doesn't even eat the tuna!  Doc's
usually the adventurous one, dietetically speaking, and he wasn't
interested.  

It turns out sweet whey is just about a half-step away from being milk
sugar, and as a low-carbing diabetic, I can't use it.  But I'd like to
find some way to make it an easier treat for Pi than for him to have to
try to lick up dry powder.  

Any suggestions?  (I've separated out a half-pound or so for him, I'm
going to find someone else who wants the rest.)

Chak