User blog comment:FairyRaven/Fairy Tail Chapter 391: Gray vs. Silver, Review and Commentary/@comment-24536822-20140704153612/@comment-4829046-20140704154719

Or he could have tried a black pudding after destroying a house and then raiding the kitchen or something. Drinking blood isn't that big a deal even if you don't actually eat people or lick your hands after mushing them. In this case it would be a blood flavoured Popsicle. Ultear had a proper reason for bad against blood ice, cause her Arc of Time did not affect living beings(which I might add contradicts how she can control trees and seeds but meh) while Silver does not have that problem.