The best thing to use for a food holder for lab blocks is a lab block hopper like this:
Made out of 1/2" hardware mesh, they have to break off pieces of food through the bars to eat it.
I modeled it after the Ware Mfg "Lab Block Hoppers" that used to be available.
Oh and the "nutri" something lb block from PetSmart is probably from Kaytee, check the label. Fine for occasional use I imagine but I wouldn't keep feeding it to them permanently
Made out of 1/2" hardware mesh, they have to break off pieces of food through the bars to eat it.
I modeled it after the Ware Mfg "Lab Block Hoppers" that used to be available.
Oh and the "nutri" something lb block from PetSmart is probably from Kaytee, check the label. Fine for occasional use I imagine but I wouldn't keep feeding it to them permanently