Last night as I prepared Rexie's Milk And Termite Mush, the echidna dived straight into the dish and schlurped down half a teaspoon of the gruel before I could mix in the milk. So I added another half-teaspoon and the milk, and let her go for it. Before the feed she weighed 504 grams.Afterward, 554 grams. That's 50 grams, or 10% of her body weight in one sitting.
I'd have to eat 8.5kg to eat 10% of my bodyweight, and would explode at some point before I finished.