I've also started using reptilinks but I imagine it would be a chore switching a royal to this prey type. I like their product because they use the whole food item(in most cases - they tell you what is included/excluded in each sausage description) ground up and stuffed into 100% natural collagen casings that range in size from 1/2g to 100g. Prey options include rabbit, quail, chicken, venison, frog legs, insects and combinations like frog/rabbit, rabbit/quail, venison/chicken, etc. They even have some with fruits/vegetables for critters that require such variety.